TESTING 18650 BATTERIES

Status
Not open for further replies.
G

gsc1ugs

New Member
I have a lot of 18650 batteries out of makita batteries i need testing because the makita charger doesnt like them, need to test if the cells are dead because most will charge up individually using a cheaper device and read around 4 volts each but when together the makita charger said its bad. I do know if one goes down the whole 18v battery wont work
 
Sort by date Sort by votes
An older Li-Ion or Li-PO is dangerous to charge if it has been discharged to less than 3V. Most Chinese protection circuits disconnect the load too low at 2.5V.
A charger should attempt charging with a very low current and if the voltage does not slowly rise then the battery is disconnected, and an error flag is set.
 
Upvote 0 Downvote
Buy an XTAR VC8, as well as charging batteries it will test them for you as well (grad mode).
 
Upvote 0 Downvote
This is my battery charger. It charges at 1000ma and tests the battery as it charges. If there is a problem charger stops charging. It charges batteries up to 4.2v.
 
Upvote 0 Downvote
gary350 said:
This is my battery charger. It charges at 1000ma and tests the battery as it charges. If there is a problem charger stops charging. It charges batteries up to 4.2v.
Click to expand...

If it's so great why are asking questions? - and from your post it isn't so great, it's not 'testing' the batteries - only charging them. The only 'testing' is to make sure they are suitable for charging - not if they are any good.

The one I mentioned does full capacity testing, as well as just charging.
 
Upvote 0 Downvote

I am not asking questions, this is not my thread. I only said, this is my battery charger it works for me.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

  • Question
Different Li-Ion 18650 types.
Replies
6
Views
1K
MrAl
M
F
  • Question
Flyback transformer insulation testing?
Replies
3
Views
1K
Flyback
F
Stress testing unknown diodes
Replies
13
Views
2K
MrAl
M
G
  • Question
Testing a 1 prong Wif sensor with a multi meter
Replies
6
Views
885
gsc1ugs
G
P
Rejuvenating NiMH batteries.
Replies
12
Views
3K
Tony Stewart
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…