Originally Posted by
Aardwolf
I'm not using disposable batteries.
I use Panasonic Eneloop and Duracell rechargeables.
Edit. There's actually a slight green advantage to (rechargeable) AAA powered lights.
The built in li-ion batteries slowly become less efficient and you end up throwing the light away after some years.
With AAA battery powered lights you just replace the battery,
I used Eneloop, but several years ago started instead to use Ikea Ladda Low Discharge AA and AAA. That said, all the Eneloops that I bought are still in use.
I have not bought any disposable AA or AAA batteries for about 15 years.
For some uses, I am experimenting with Lithium Ion 1.5v AAA and AA batteries. They put out a constant 1.5 volts. For example they work great in my kitchen scale. But when they run out of power, it is very sudden. I would not recommend them for taillights, as you would not know when they quit.