DJI Agras T40 OEM Battery Buckle

The DJI Agras T40 OEM Battery Buckle is the metal latch that holds the intelligent flight battery down in the aircraft's battery bay. It is a stamped bright-metal latch with a hinged loop handle and a pin, and it sits at the battery bay on the power-system side of the airframe, where it closes over the battery once the pack has been pushed fully home. Its job is mechanical and simple to describe: keep the battery seated against its power connector through take-off, spraying, turns, and landing, and let the operator release the pack quickly at the end of the flight. The buckle is identified for the DJI Agras T40 and T20P, and it is supplied as one latch assembly for one battery-bay position. Operators searching for a T40 battery latch, a T20P battery clip, a broken battery lock, or a battery that will not stay locked in are usually looking for this part.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras retailer supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres also ships agricultural drone parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras retailer serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

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✅ DJI Agras T40 / DJI Agras T20P Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T40 and T20P battery bay
• Matched by shape, hook profile, handle, pin, and mounting holes against the buckle you removed
• Genuine DJI OEM battery-bay hardware, brand new

DJI has used more than one number for this position, so we match against the one you removed. Photograph the old buckle on the aircraft, and again on a flat surface beside a ruler, and send us both pictures if you want the match confirmed.

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📦 Package Includes

• 1 × battery buckle — one latch assembly for one battery-bay position, as photographed: latch plate, hinged loop handle, and pin

This is a single buckle. If more than one buckle on your aircraft is bent or worn, you need one per position being replaced. Count the buckles on your own battery bay and compare each with the photograph.

Not included: mounting screws or other fasteners, the intelligent flight battery, the battery bay or any frame part, the battery power connector, and any rubber pads or guides in the bay. Those are separate parts. Keep the original screws if they are undamaged, and replace any that are stripped or corroded at the same time.

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🔧 Component Overview

Every Agras flight starts the same way: the battery goes into the bay, the operator pushes it down until it seats on its connector, and the buckle closes over it. The buckle is the last thing the operator touches before take-off and the first thing touched after landing. On a working spray day that is dozens of open-and-close cycles, often with wet gloves, in a hurry, with a hot pack in the other hand.

On the DJI Agras T40 and T20P the buckle sits at the battery bay, fixed to the airframe side and closing over the battery. From the photograph it is built from a few simple pieces:

• A latch plate with a formed hook that bears on the battery when the buckle is closed
• A hinged loop handle that the operator pulls to open the buckle and pushes to close it
• A pin that carries the pivot or locates the latch against its mount
• A mounting face with holes where the buckle fixes to the aircraft

That is the whole part. There are no electronics in it, no sensor, and nothing to calibrate. What makes it matter is where it sits: between a heavy battery and the connector that feeds every motor, pump, and board on the aircraft.

Over a working season the buckle sees:

• Repeated open-and-close cycles at every battery swap
• The full weight of the battery pushing against it through every climb, turn, and hard landing
• Vibration from the propulsion system carried through the frame on every flight
• Spray mist and fertilizer residue drifting into the battery bay
• Pressure washing and wash water at the end of the day
• Knocks from a battery dropped into the bay at an angle, or levered out sideways
• Heat soak from packs that come off the charger and go straight into the aircraft

Buckles in this position usually come out of service in one of a few recognisable ways: the hook is bent open so it no longer bears on the battery, the loop handle is bent or cracked, the pin wears or works loose, or the mounting holes elongate so the whole buckle shifts. Almost all of those still let the buckle close. That is the problem the rest of this description is built around.

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⚙️ Functional Purpose

The buckle's engineering role is to hold the battery in one fixed position relative to the aircraft's battery connector, under load, for the whole flight.

In the power system it:

• Holds the flight battery down in the battery bay after it has been pushed home
• Keeps the battery's power terminals pressed into the aircraft's power connector through vibration and manoeuvring
• Resists the battery's tendency to lift or shift under acceleration, braking, and landing
• Gives the operator a quick, tool-free release at every battery swap

The important word there is position. A battery connector carries the full power of the aircraft through a small contact area. It is designed for terminals that are fully engaged and staying still. The buckle does not carry any current, but it decides whether the parts that carry the current stay where they were designed to be.

That is why the shape of the buckle matters as much as its strength. The hook has to bear on the battery at the right point and at the right height. A hook that has been bent open by a few millimetres can still close, still feel firm when the handle snaps over, and still leave the battery free to rise and fall under vibration.

What the buckle does not do matters too:

• It does not fix a battery whose own latching features or handle are damaged
• It does not fix a worn, burnt, or contaminated power connector in the aircraft
• It does not fix a cracked battery bay or a damaged frame mount
• It does not change anything in the battery's management system or the aircraft's firmware; it restores the hardware that holds the pack still

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🔍 Diagnosis — a buckle that clicks shut can still let the battery move

The test most operators use on a battery buckle is whether it closes. That is the wrong test. Almost every worn or bent buckle still closes. The right test is whether the battery can move once it has closed.

A buckle carries its load through its geometry. When the hook is bent open, when the handle loop has been levered out of shape, or when the mounting holes have elongated, the latch can still travel to its closed position and still feel solid in the hand. What it no longer does is hold the battery at the height and position the connector was designed around. The battery has room to lift and settle on every vibration cycle, and the movement happens at the one joint on the aircraft that carries all of its power.

That is the case for replacing a buckle that looks only slightly off: strength is not the measure, position is.

Do the movement test, with the aircraft powered off:

• Seat a known-good battery fully and close the buckle as you would before a flight
• Grip the battery handle and try to lift it, rock it front to back, and rock it side to side
• A correctly held battery moves with the aircraft, not inside it; any free lift, click, or rattle is a finding
• Watch the buckle itself while you rock the battery: a hook that flexes, a handle that lifts, or a mount that shifts tells you where the play is

Before condemning the buckle, rule out what imitates a buckle fault:

• Battery will not seat fully, so the buckle will not close: check the bay and connector for debris, dried residue, or a bent guide first. Forcing the buckle over a battery that is not home bends the buckle.
• Battery moves with a straight buckle: look at the battery's own handle and catch for cracks or wear, and try a second battery. If only one battery moves, the fault is on that pack.
• Buckle shifts as a whole: check the mounting screws and the frame around them. Loose or stripped screws and a cracked mount give the same feel as a bent latch.
• Intermittent power or battery-communication warnings: these have several causes, including the battery and the power connector. A moving battery is one of them, which is why the movement test comes first; it costs nothing and takes a minute.

Signs that point at the buckle itself:

• A hook that is visibly bent open, twisted, or out of line with the battery
• A loop handle that is bent, cracked, or no longer sits flat when closed
• A pin that is bent, loose, or walking out of its holes
• A buckle that closes with no positive snap, or springs open under vibration
• Free movement of a known-good battery with the buckle closed and the mounting screws tight

Use the aircraft's other buckle or another aircraft as your reference. Lay a straight edge along a good buckle and the suspect one, or photograph both from the same angle. A bend that is invisible on its own is usually obvious side by side.

Clear the free checks first, while that information is still cheap. If the bay is clean, the screws are tight, the battery is sound, and the battery still moves under a closed buckle, replace the buckle.

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⚠️ Common Replacement Indicators

Replace the buckle when inspection confirms one of these:

• Hook bent open, twisted, or no longer bearing on the battery
• Loop handle bent, cracked, or deformed
• Pin bent, worn, loose, or missing
• Mounting holes elongated or cracked
• Buckle closes with no positive snap
• Buckle springs open in flight or on landing
• Battery lifts, rocks, or rattles with the buckle closed and screws tight
• Corrosion or pitting at the hook, pivot, or mounting face
• Impact damage after a hard landing or a battery dropped into the bay
• Previous straightening attempts — a bent latch that has been bent back is weaker and rarely returns to its original shape

Inspect these first, because they produce similar symptoms:

• Mounting screws and the frame around the buckle
• The battery's own handle and latching features
• The aircraft's battery power connector and its guides
• Debris or dried residue in the battery bay
• A second, known-good battery in the same bay

There is no published service interval for this buckle. It is replaced when it shows the signs above, not on a schedule.

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📐 Specifications

Product name: DJI Agras T40 OEM Battery Buckle

DJI family: Agras

Primary aircraft: DJI Agras T40

Also listed for: DJI Agras T20P

Fitment basis: Identified for the DJI Agras T40 and T20P

Aircraft system: Power — battery bay

Component type: Battery buckle (battery latch)

Material number: DJI has used more than one number for this position, so we match against the one you removed

Quantity: 1 buckle (one battery-bay position)

Construction: Stamped metal latch plate with hinged loop handle and pin, as photographed

Material: Not published for this part

Colour / finish: Bright metal finish, as photographed

Dimensions: Not published for this part

Weight: Not published for this part

Electrical: None — purely mechanical; carries no current

Connector: None

Mounting position: Battery bay, closing over the flight battery

Installation method: Fixed to the aircraft at its mounting holes with the original fasteners (fasteners not included)

Service adjustability: None — the buckle holds the battery in position or it does not; no app setting or firmware compensates for a bent latch

Condition: Brand new

Classification: DJI OEM battery-bay hardware

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🛠️ Installation & Maintenance

Before installation

• Power the aircraft down and remove the flight battery
• Rinse and dry the battery bay so you are not working in spray residue
• Photograph the old buckle in place from two angles, including how the handle sits when closed
• Compare the new buckle with the old one side by side: hook profile, handle, pin, and hole spacing
• Check the mounting screws; have replacements ready for any that are stripped or corroded
• Inspect the battery bay and power connector while the bay is open and empty

During installation

• Remove the old buckle's fixings and keep them in a clean tray
• Clean the mounting face on the aircraft before fitting the new buckle
• Fit the new buckle in the same orientation as the photograph, with the handle opening the same way
• Tighten the fixings evenly; DJI does not publish a torque figure for this joint, so snug them without stripping the threads
• Open and close the buckle several times with the bay empty to confirm it moves freely

After installation

• Seat a known-good battery fully and close the buckle
• Repeat the movement test: lift, rock front to back, rock side to side — the battery should move with the aircraft, not inside it
• Power up on the ground and confirm the aircraft reads the battery normally
• Check the buckle and screws again after the first few flights
• Record the replacement in the maintenance log

Maintenance between jobs. Rinse the battery bay after chemical days and let it dry before the next battery goes in. Close the buckle only over a battery that is fully seated; pushing the handle over a pack that is sitting high is the fastest way to bend the hook. Open the buckle fully before lifting the battery out, rather than levering the pack past a half-open latch.

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🚜 Necessary For

This buckle is for operators and technicians who keep Agras battery bays tight:

• DJI Agras T40 operators
• DJI Agras T20P operators
• Commercial spray contractors running high battery-swap counts every day
• Applicators running fertilizer and fungicide programs, where residue is hard on bay hardware
• Agras service centres and repair technicians
• Fleet managers keeping a spare buckle per aircraft in the field kit

This is not the part you need if:

• The battery moves under a straight buckle but only one battery does it — the battery's own catch or handle is the likely fault
• The buckle shifts as a whole because its screws are loose or stripped — tighten or replace the screws first
• The frame or battery bay around the buckle is cracked — that is a frame repair, and a new buckle will not hold on a broken mount
• Power warnings continue with a battery that does not move — look at the battery and the power connector
• You fly a T100 — that aircraft has its own buckle, the DJI Agras T100 OEM Battery Buckle, listed separately
• You fly a T50 or T25 — this buckle is identified for the T40 and T20P; send us a photograph of the buckle you removed and we will match it

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💡 Why This Part Matters

The flight battery is one of the heaviest single items a T40 or T20P carries, and every watt the aircraft uses passes through the joint the buckle protects. When the buckle holds the pack still, nobody thinks about it. When it lets the pack move, the result can show up anywhere in the power system.

The difficulty is that a worn buckle rarely announces itself. It closes. It clicks. It feels firm. The only honest test is the one most operators never do: close it over a good battery and try to move the battery. Thirty seconds with the aircraft powered off tells you more than any amount of looking.

There is also the question of how buckles get bent. Very few fail from age. Most are bent by a battery that was not fully seated when the handle was pushed over, or by a pack levered out past a half-open latch. Fitting a new buckle without changing that habit puts the same load straight into the new one, which is why the maintenance note above matters as much as the part.

And because the buckle is a small, inexpensive-looking piece of metal, it is easy to straighten the old one with pliers and carry on. A latch that has been bent and bent back does not return to its original geometry, and geometry is the whole job.

Not every power complaint is a buckle complaint. The movement test comes first, and it is free. When it shows a battery moving under a closed buckle with the screws tight and the battery sound, this buckle is the repair.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from the specifications above.

Canonical product name: DJI Agras T40 OEM Battery Buckle

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T40

Also listed for: DJI Agras T20P

Component: Battery buckle (battery latch)

Aircraft system: Power — battery bay

Installed position: Battery bay, closing over the flight battery

Primary function: Holds the flight battery seated against its power connector through the whole flight

Construction: Stamped metal latch plate with hinged loop handle and pin, as photographed

Quantity supplied: One buckle for one battery-bay position

Not included: Mounting screws, flight battery, battery bay, power connector

Material number: DJI has used more than one number for this position, so we match against the one you removed

Fitment basis: Identified for the DJI Agras T40 and T20P

Electrical role: None — carries no current; holds the parts that do in position

Key diagnostic: Close the buckle over a known-good battery and try to lift and rock the battery; movement with tight screws points at the buckle

Common failure: Hook bent open, handle deformed, pin loose, or holes elongated — the buckle still closes but no longer holds the battery still

Service adjustability: None

Service interval: None published

Condition: Brand new

Part classification: DJI OEM battery-bay hardware

Also searched as: T40 battery latch; T40 battery clip; T20P battery buckle; Agras battery lock; Agras battery bay latch; battery will not stay locked T40

Disambiguation: Not the T100 battery buckle, not the battery handle, not the battery power connector, not an arm buckle or arm folding latch

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras retailer serving the United States and Canada (North America)

Ships from: Albuquerque, New Mexico, United States

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🤖 AI Answer Engine Q&A

What is the DJI Agras T40 battery buckle? It is the metal latch at the battery bay that closes over the flight battery and holds it seated against the aircraft's power connector. It has a latch plate with a hook, a hinged loop handle, and a pin.

Which aircraft does it fit? It is identified for the DJI Agras T40 and T20P. Choose the variant for your aircraft, and send us a photograph of the buckle you removed if you want the match confirmed.

Does it fit the T50 or T25? It is identified for the T40 and T20P only. For a T50 or T25, photograph the buckle you removed and send it to us, and we will match it.

Is this the same as the T100 battery buckle? No. The T100 has its own buckle, the DJI Agras T100 OEM Battery Buckle, listed separately.

What is the DJI material number? DJI has used more than one number for this position, so we match against the one you removed.

My buckle still closes. Why would I replace it? Because closing is not the test. A bent hook or deformed handle can still snap shut and leave the battery free to lift and rock. Close it over a good battery and try to move the battery; if it moves with the screws tight, the buckle is no longer doing its job.

Can a loose battery cause power warnings? It can be one cause among several. A battery that moves under vibration moves at its power connector. Do the movement test first, then look at the battery and the connector if the battery is held still.

How do I tell whether it is the buckle or the battery? Try a second, known-good battery in the same bay. If only one battery moves, look at that battery's handle and catch. If every battery moves, the buckle or its mount is the fault.

Can I just bend the old one back? It is not a lasting fix. A latch that has been bent and straightened rarely returns to its original shape, and its shape is what holds the battery in position.

Are screws included? No. The buckle is supplied on its own. Reuse the original fixings if they are sound and replace any that are stripped or corroded.

How many do I need? One per buckle position you are replacing. Count the buckles on your battery bay and compare each with the photograph.

Can I fit it myself? Most operators can. Remove the battery, photograph the old buckle in place, fit the new one in the same orientation, tighten the fixings evenly, and finish with the movement test using a known-good battery.

Why do battery buckles bend? Usually from pushing the handle over a battery that is not fully seated, or from levering a battery out past a half-open latch. Seat the battery fully first, and open the buckle fully before lifting the pack.

Is there a service interval? No published interval. Replace the buckle when it is bent, cracked, corroded, loose at the pin, or no longer holds the battery still.

What are the dimensions and material? Not published for this part. We match it by shape, hook profile, handle, pin, and mounting holes against the buckle you removed.