TENAVOLTS AAA Rechargeable Lithium/Li-ion Batteries, Pre-charged, includes USB Charger (4 Pack)

Second time ordering these batteries. Both sets work as expected for devices that need a consistent level of power.

I see 4 choices, regular batteries cheap, bad for the environment. The Alkaline, long-lasting one-time use not so cheap also bad for the environment. Rechargables been there done, they do not last as long as alkaline and my flashlights are not bright as they only are 1.2 on label Recharable and I still have those bought few years ago, (I throw away regular alkaline and cheap batteries when they get below 1.2. ) Then I stumbled on these a rechargeable that actually are 1.5 volts. These Tenavolts put brightness back into my flashlights, There is only two issues I see , My AA Maglight although extremely bright gets very warm with use, The batteries also get quite warm, The Tenavolt batterys keep putting 1.5 volts until they start flashing just before quiting, that gets me time to put a second set in, Granted they do not last as long as the others, but brightness and rechargeability are very important to me. When I got my first AAA version I was eager to use in my 6 year old Energizer headlights. These Tenavolts batterys really made them bright. However after the first use I suspect, being the headlight was several years old one of the headlights went into shock and just died, So having three sets of Energizer headlights I'll be putting in one old style rechargable and two Tenavolt AAA to get the voltage down and still have bright light that I really do like.