Battery stuck

Lucie

Just Joined
Jul 15, 2025
3
0
Hello,
I own a Synapse Neo.
I am unable to remove completely the battery out to recharge it.
The key turns and the cover moves out slightly, but will not come out its case.
Please help...
lucie, cyclist
Rivière-du-Loup, Québec, Canada
 

matthewslack

Esteemed Pedelecer
Nov 26, 2021
2,511
1,639
Is this a new problem? When was the battery last removed?
 

Lucie

Just Joined
Jul 15, 2025
3
0
Thank you for your return.
I do not usually remove the battery for recharge. I do now because my bike is in a locker at my new place where I moved to last week.
The battery is half out, but...
lucie
 

thelarkbox

Esteemed Pedelecer
Aug 23, 2023
1,632
503
oxon
Try lubricating the lock, if no oil/grease at hand try a HB pencil and rub the lead over the key.

Then retry to open the lock fully jiggling the key as you go. Once off split the battery case and replace the lock with a new one from ebay (circa £5).

If still no luck check out youtube for ebike battery/lock picking vids. if the vids i found dont show up for you search for lock raking/bumping/picking. ;)

Its not a tricky lock pick but could take you time to gain/hit the knack, then again you could hit it on jiggle attempt #1..

Walking the bike into a Brick and Mortar actual shopfront for a locksmith (if available in your locality) may get you a quick cheap deal on a one off by a board pro. BUT DO NOT CALL a 24hour locksmith service a new bike would probably be cheaper. ..

bon chance..

If i have misunderstood the problem? please post pictures to illustrate.
 

eas2lv

Pedelecer
Sep 1, 2024
58
14
Canada
Hello,
I own a Synapse Neo.
I am unable to remove completely the battery out to recharge it.
The key turns and the cover moves out slightly, but will not come out its case.
Please help...
lucie, cyclist
Rivière-du-Loup, Québec, Canada
In some of these models, after turning the key you have to press a catch to release the battery. Look for one at the bottom or top.
 
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matthewslack

Esteemed Pedelecer
Nov 26, 2021
2,511
1,639
If not that, then lubricate and exercise the pivots/hinge/etc. Probably lack of use and build-up of dust/grime are involved.
 

guerney

Esteemed Pedelecer
Sep 7, 2021
12,098
3,382
Perhaps the frames bend a bit down there with use, leading small tolerances on battery locking mechanisms to become too small? Is that silicone battery gasket sticking? Dude in the video below uses a carbon steel screwdriver, personally I'd try pry using a plastic pry tool of some kind to risk damage to that shiny paintwork, perhaps a nylon tyre iron, if the end was thin enough - if it wasn't, I might file or grind it till it was. Or and old credit card, or one or several of those cards PAYG SIM cards arrive embedded in - thin and not terribly strong, but they'll bend or break before you damage paint probably, and create a little wiggle room.


 
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