How to see if a battery is protected

Batteries and Chargers Rechargeable Batteries
11

I cant remember how many times people have asked how they can identify protected cells. Thanks for the great tutorial!

12

That will depend on the exact construction, but probably not.

13

excellent, thanks

14

That is exactly the reason I decided to do this article, now anybody can give a good answer with just one link.

I tried to keep it simple, but I did get technical in the last part. I wanted to include some information about what unprotected cells was (I did have to open a few old cheap cells to find one with a PTC).

15

Thanks HKJ,Great.

16

Excellent information here! Sticky’d. Thanks a lot for putting this together.

17

Very useful . Thanks! :bigsmile:

18

Welcome to the Forum! :beer:

19

:bigsmile: Thanks

20

Great post wiyh many informations !! Many thanks !

21

:8)

22

Brilliant info that newbies like me can keep coming back to as we forget :slight_smile: ,cheers hkj

23

Subscribing so I can point others to this info

Phil

24

Great info. Very informative. Was just wondering if my batteries were protected or not, and Robo referred me to the thread. Turns out my batteries are protected.

Thanx.

25

Just came from your site. I believe there are some double posts in last group of pics.

26

Oops, fixed, Thanks.

27

Fantastic little guide, HKJ. Thanks again!

28

Nice information to check battery protected or not. Thanks for sharing this useful information

29

Thanks HKJ.
Will the added protection board cause difference in diameters?

30

It will make battery longer but the diameter will be almost the same or just slightly larger (~0.5mm or so) because when you add protection you have to use one more layer of wrapping foil because there is an additional “flat” wire that goes from protection PCB to opposite pole and it needs to be isolated.