I order 18650 Keeppower 3400 mAh (Panasonic inside)
I have charger for smaller Li-ion batteries, but it has current 0.25 Amper only.
It will charge Keeppower for more than 10 hours.
Is it O.K. to charge with current lower than 0.1 C ?
(Charging Nimh batteries with 0.1 C is actually even better, my Sanyo AA last more than 10 years.)
My second question: My charger was cheap, but it is reliable, charged battery has always 4.15 V.
Is there any reason to buy expensive brand name charger ? Does it charge differently (beside the speed) ?