Onewheel Pint Battery & BMS Replacement

Difficulty: Moderate

Steps: 15 – 16

Time Required: 1 – 1½ hours

Introduction

If you’re not getting the range you once did from your Onewheel Pint and a 72 hour balance charge hasn’t made things any better, use this guide to help you swap your battery and regain your freedom!

For your safety, power off your Onewheel Pint prior to disassembly. This reduces the risk of electrical malfunctions and/or damage during the replacement process.

Note: Altering or damaging any component of your Onewheel Pint during disassembly/reassembly may render your existing warranty void or lead to refusal of non-warranty service at the discretion of Future Motion, Inc. (the creators of Onewheel).

Step 1 Remove the fender/delete screws and fender/delete

Caution: Make sure your old battery is discharged to 25% or less prior to removing it. A charged lithium-ion battery can present a fire or explosion hazard if punctured.
Remove all four (4) screws using a TP20 bit.
Note: Keep screws organized as they are easy to mix up and/or lose.
To remove the fender/delete, apply pressure to each side of it, near the axle carriers, and pull it up and away from the Onewheel™.

Step 2 Remove the bottom bumper screws and bumpers

Remove all ten (10) screws using a TP20 bit.
To remove the front bumper, pull it toward the nose of the Onewheel™.
To remove the rear bumper, pull it toward the tail of the Onewheel™.
Note: If you are unable to remove the rear bumper by hand, you may use a flat head screwdriver to pry it away from the rails (be gentle).

Step 3 Remove the top footpad screws and footpads

Remove all four (4) screws using a TP20 bit.
Caution: For the front footpad sensor connector, turn (counter-clockwise) only the smaller part of the connector closest to the controller. Turning the entire body of the connector can damage it or your controller.
Note: If you are unable to remove the footpad sensor connector using your fingers, you may use a Future Motion™ footpad connector wrench or a pair of long nose pliers (be gentle).

Step 4 Remove the left-side hub bolts

Remove the two (2) bolts using a T30 bit.
Caution: Be sure to use the appropriate bit as these bolts are prone to stripping.
Note: If you find it difficult to remove the hub bolts with hand tools, you may use an impact driver to loosen them. Use ONLY impact rated bits.

Step 5 Remove the left-side battery/controller module retaining screws

Remove all four (4) screws using a TP20 bit.

Step 6 Remove the left-side rail

Caution: Be extremely careful not to damage the wiring harness as you remove the rail. The wiring harness can be gently manipulated in order to allow removal.

Step 7 Remove the right-side battery/controller module retaining screws

Remove all four (4) screws using a TP20 bit.
Caution: Be careful not to let the battery/controller assembly fall as you remove the last screw.

Step 8 Remove the battery/controller assembly

Caution: Be extremely careful not to bend or damage the wiring harness while handling the battery/controller assembly.

Step 9 Remove the controller cover screws and controller cover

Remove all eight (8) screws using a TS20 bit.
Caution: Be extremely careful not to damage the controller gasket while removing the controller cover.

Step 10 Disconnect the controller XT60 and data connectors

Remove the XT60 connector first.
Remove the data connector by pinching the tab and gently pulling upward.
Caution: It is extremely important that the connectors be disconnected in this order to avoid causing damage to your Onewheel™ controller.

Step 11 Remove the battery enclosure screws and battery enclosure lid

Remove all eight (8) screws using a TS20 bit.
Caution: Be extremely careful not to damage the battery enclosure gasket while removing the battery enclosure lid.

Step 12 Remove the BMS cover

Remove the two (2) screws using a T8 bit.

Step 13 Disconnect the battery balance connector

Remove the connector by pinching the tab and gently pulling upward.
Caution: It is extremely important that the battery be disconnected in this order to avoid causing damage to your Onewheel™ Battery or BMS.

Step 14 Disconnect the battery XT60 connector

Note: Remove only the XT60 connector on the left side of the BMS (the one attached to the battery).

If you need to remove your Battery, proceed to Step 15 (Battery).

If you need to remove your BMS, proceed to Step 15 (BMS).

Step 15 (Battery) Remove the battery

Remove the battery by gently lifting up on the side closest to the connectors.
Caution: DO NOT use sharp tools to pry the battery from the enclosure as a puncture can present a fire or explosion hazard.

Step 15 (BMS) Disconnect the wiring harness XT60 and data connectors

Note: The wiring harness XT60 and data connectors can be removed in any order.
Caution: When removing the wiring harness XT60 connector, be extremely careful not to hit/damage the small ceramic capacitors directly to the right of the connector.

Step 16 (BMS) Remove the BMS

Remove the BMS by gently lifting up on it.
Caution: The BMS is sensitive to static electricity and should be handled with extreme care. If you need to store it, an anti-static bag is highly recommended.