New Home Forums General Optics/Nightvision CREE XM-L BATTERY TESTS Reply To: CREE XM-L BATTERY TESTS

AGAIN LIPO bateries without pcb/protection ARE DANGEROUS IN FLASHLIGHTS, under or overvoltage leads to chemical reactions that destroy the battery and can cause exlosion/fire you name it, att to that a container like a flashlight the resembles a pipe bomb and the pressures inside can get really high before they pop

theres a bunch of chinese scams going on, and batteries are no exception, i got a really good charger/discharger from my rc hobby and it can tell me resistance and how many mah it charged and discharged

i have 3 ultrafire batteries the grey ones that are 2600 mah, none of them have more than 2000 mah out of them with a 3A load….with a 1A load its better and gets around 2400, and with a 500mah load i finally got 2600

there was different temps depending on battery even though they where bought at the same time, same make and model. they are ok as they are cheap, but theres a better option, internal resistance in two batteries was 4 ohms and in the third it was 25 ohms 🙄 higher resistance = heat

TENERGY 2600mah lipo….light blue battery with a green band at the bottom, they have proven to be much more consistent and actually giving me 2450 mah at a 3A load and even a 2700 mah with a ½A load….they have pcb so they are protected, temps where consistent and stable luke warm, they are a bit more expensive, 1$ more or so…nothing critical, considering you just spent 30$+ on a flashlight 🙂

remember lipo’s like to be topped off frequently…unlike nimh or nicd batteries that are best if completely discharged and recharged, and they still get memmory effect, lipo suffer none of these drawbacks, but they like to be charged often so they dont run low, and its good to keep them topped off which will also prevent you from running the battery low

most pcp protects the battery from going below 2.7 or 2.8v which by the RC industry is a tad low here we stop at 3v, and with newer nano infused batteries 3.4v is considered empty. so just keep the lipo’s charged

thanks lurker for posting your findings…i have several ternergy and they are much more consistent and can deliver the power….i never really thought about testing batteries like you just did….im considering running all my batteries through a test just for the fun of it….now where did i put the temperature guage for the charger…and the long usb cable to hook charger up to pc…

anyhow thanks for your posting