Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
the most important thing is that you don't have to build it yourself.after using it intensively i can tell that it certainly saves your liion from bursting into pieces and killing everybody around.it protects from allmost every error in charging and using the battery.however it is important to know what you do
values for the voltage cut are pretty much not equal and exact. short circuit protection is very aggresive and disconects faster than the 10Amps specified.
for a small sum you can save expensive battery and priceless life(your own)
i bought and i will buy more. you can buy with confidence this very cheap but very usefull item
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