Start with the bit u need help with.

“Roughly this big” is how u end up with a battery that fits until the lid goes on. Measure the usable space, including the bits in…

Wah lau, bike photo clear until can see the whole thing. That tiny plug in the corner? Cannot see sia. Send these shots so we can…

V, Ah, A. Three different things. Don’t compare the biggest number on each listing and hope they mean the same thing.

Got a step, a narrow neck or a frame tube in the way? Show the whole space before deciding how much battery can fit.

Before the battery size, show us where it will sit. Mounting, moving parts and the cable route need space too.

Plug goes in, steady. Now check if that charger is meant for your battery before switching it on.

Need one loose cell or a battery for your bike? Different thing lah. Check what you need, then go to the right listing.

Same model can use, right? Maybe. Show us the version, battery mount and connector first. Bike name alone is not enough to check fit.