We have a Olight laser/light combo. I haven't recharged it yet, but side by side with my sisters Crimson Trace it is brighter. She uses rechargeable batteries in hers and has never had any problems.
The rechargeable lithium ion batteries usually do have a higher voltage than the normal, primary cells. There is more at play than just the mAh capacity.High mA/hr batteries are not "more powerful" than lower rated batteries, they just give a longer run time. Unless they produce higher than standard voltage, they cannot hurt the item they are used in. It's as if you added a bigger gas tank to your car. The car won't have more power, just more range.
You're right. It's not how much power they store/charge up to. It's that the higher mA/hr batteries amost (if not) always have a higher voltage, as ShipWreck pointed out.High mA/hr batteries are not "more powerful" than lower rated batteries, they just give a longer run time. Unless they produce higher than standard voltage, they cannot hurt the item they are used in. It's as if you added a bigger gas tank to your car. The car won't have more power, just more range.
Streamlight is selling rechargeable 18650's, maybe they'll start selling the CR123R batteries, too.
You know, these do have the USB port in the side, like you mentioned. I'll have to keep an eye out for that when looking for some more.The 18650s Streamlight sells have a USB charging port/cell protection circuit built in. It add a bit of length to the package. Cells without the circuit will still work in the flashlight because of length of the spring in the tail cap. Probably not enough room in the 123 package to do this.