I keep any battery higher than 2.5V. Those at 3.17 should be fine as long as capacity is OK. I highly recommend you get a hobby charger such as this (this one is very good and cheap) so you can do discharge tests and charge batteries of course. There are plenty of threads here discussing hobby chargers and laptop pulls.
Turnigy Accucell 6 Hobby Charger
Reviewer's Overall Rating: ★★★★★
[image]
Summary:
Battery types:
Just about anything
Power:
12V DC in
Price Paid:
$32.98 shipped plus $7.79
From:
Hobby King
Date Ordered:
24 Mar 2011
Pros:
Charges/Discharges just about anything
Alarm when finished
Bright display
Configurable
Optional temperature probe
Safety cutoffs for temperature, time elapsed, and total charge
Data logging possible with connector (see Post 77 )
Cons:
Complicated
No b…
Hi guys,
I recently went on a hunt for laptop battery packs so I could pull 18650 cells. I think I got about 6-7 packs and after I threw away any cell with lower voltage than 2.5V I charged all of them with a generic cheapo charger that I got with a SK68 clone. After my Tenergy Accucel6 arrived (some days ago) I started doing discharge tests to 3V at 1A. Results are posted below. Cells listed on the same color rows came from the same batter pack. All cells had retained voltage and had not dropp…
Hi All,
Just recently joined this awesome forum to fuel my flashlight obsession
here is a 2s balance charge lead set up for 18650's i had to cut the springs in the battery boxes as they are for none protected cells and I'm using protected cells so to get them to fit i had to remove the spring and reverse the polarity of the battery boxes (run the batteries the other way round) i have also made some singular ones for protected cells and use red heat shrink to cover the black wires and black heat shrink to cover the red wires so there is no confusion witch way the battery goe…
etc.
have fun
