Battery bank for lights in the frame?

Swiss Roll

Member
Jul 28, 2021
125
92
Switzerland
As the nights draw in, I am doing a lot of lights charging, so i have the bike charger, and 2 different kinds of usb, even though the lights came as a set.
So I thought it would be cool to supply the lights from a battery bank installed inside the frame, and having one usb cable to charge the battery bank.
Has anyone tried this? Any downsides? My lights have a built in battery, so that might be a problem, constantly having the onboard battery being charged. But I know not much about electronics.
 

Tooks

Well-known member
Subscriber
Mar 29, 2020
490
579
Lincs UK
As the nights draw in, I am doing a lot of lights charging, so i have the bike charger, and 2 different kinds of usb, even though the lights came as a set.
So I thought it would be cool to supply the lights from a battery bank installed inside the frame, and having one usb cable to charge the battery bank.
Has anyone tried this? Any downsides? My lights have a built in battery, so that might be a problem, constantly having the onboard battery being charged. But I know not much about electronics.
If your bike lights allow being charged externally whilst being switched on, then they’ll have been designed to do so and no worries there.

It’s probably more convenient to charge them from an external battery pack attached to the top tube or similar though, rather than keep removing a pack from inside the frame to recharge it?

What ebike is it? Is it worth investing in some lights than can connect to the bike battery?
 

Swiss Roll

Member
Jul 28, 2021
125
92
Switzerland
If your bike lights allow being charged externally whilst being switched on, then they’ll have been designed to do so and no worries there.

It’s probably more convenient to charge them from an external battery pack attached to the top tube or similar though, rather than keep removing a pack from inside the frame to recharge it?

What ebike is it? Is it worth investing in some lights than can connect to the bike battery?
Well, I don't want to have to take a lot of stuff off the bike, if i lock it up, and also i dont want any more external bags and stuff.
Connecting to the battery is a pain with bosch and its battery cutoff limit at 10%, otherwise i would have done that already.
I thought i would leave the battery bank inside, and have cables to the lights leading out of the brake ports, and a cable also leading out there, to charge the battery.
I have a Price e all mountain, a bit obscure swiss brand. here is a pic:

 
Last edited:

Tooks

Well-known member
Subscriber
Mar 29, 2020
490
579
Lincs UK
Well, I don't want to have to take a lot of stuff off the bike, if i lock it up, and also i dont want any more external bags and stuff.
Connecting to the battery is a pain with bosch and its battery cutoff limit at 10%, otherwise i would have done that already.
I thought i would leave the battery bank inside, and have cables to the lights leading out of the brake ports, and a cable also leading out there, to charge the battery.
I have a Price e all mountain, a bit obscure swiss brand. here is a pic:

That’s fair enough, can’t see a problem if you’ve got space in the frame somewhere and the lights are happy being externally powered despite the internal battery?
 

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