Are All 3.7 Volt Batteries Rechargeable

I couldn't find the 3.7 volt version when buying the charger, batteries and tactical flashlight so I mistakenly assumed (I know, I know...)it would charge the 3.7 volt batteries, too. It doesn't now I must buy the 3.7 volt version and am stuck with 2 ea. of the 3 volt batteries w/charger that I don't want or need. but it does charge quick and stays charged, too.

I have a Streamlight Polytac flashlight that only accepts 3v cr123 batteries. all other rechargeable cr123 batteries are 3.7v which is too much voltage, but these Watson batteries work great. I love how these Watson batteries came completely sealed. B&H photo seems like the only place that carries them. I hope they don't ever stop!

This little flashlight packs a punch. The secret is in the 3.7 volt/ 2.4Wh 16340 with built in USB micro rechargeable port (on the battery). That battery gives this little flashlight a powerful long lasting bright beam. I'm glad that I purchased two of them. I keep one in my toolbox and the other in my car. Highly recommended.

I've this flashlight for almost 4 years now and use it on the job pretty much every day. The 3.7 volt Li-Ion rechargeable battery is just starting to go but still works. It so convenient just to plug into a usb a charger.

Eartec Rechargeable 3.7V Lithium-Ion Battery for UltraLITE & HUB Systems

Great light does what I want is bright for size of you use 3.7v rechargeable it is pretty bright,. Only complaints is it is not as bright as the hp1 that this flashlight replaced on there market and the red ring on the tail cap so I use a old hp1 cap also doesn't have the anti roll thing so it will roll off a uneven surface

2/3 of a stop is a good value for my needs. the full stop was too much and 1/3 not enough at all.

Quality rechargeable batteries.

These are the best rechargeable batteries I've ever used.

Rechargeable batteries - Great Life!!