Tutorial: Rewrapping a battery

Batteries and Chargers Rechargeable Batteries
72

I got some clear from FT.
Didn’t do a thing with a blowdryer, had to use a blowtorch…

73

I use a heat gun, looks like a blow dryer, but way hotter.

74

You mean a paint-stripper-heat-gun?
Got one somewhere…
Will try it next time.

75

I’ve held it over a toaster. Worked well except the wrap didn’t take on enough of the delicious aroma. Easier to shrink it evenly then it is with a butane torch.

76

I used a Bic lighter :stuck_out_tongue:

77

I use a hair blow-dryer for the shrink ends and body, and afterwards use a lighter to remove or shrink the crease lines on both sides for a nice tight shrink. The flame from the lighter should touch in a buzz the crease to shrink it.

78

I used an 1800 watt blow dryer and had no problems at all on hot/high. Only took about 10-15 seconds for the whole wrap to seal tight! :smiley:

79

Is there a similar tutorial on installing cell protection PCB’s. I got these cell protection PCBs and clear heatshrink from Fasttech and I intend to use it on my Samsung ICR18650-28As but I’ve no idea what to place in the positive end yet. :~

80

Not really, but maybe this can help you: http://www.lygte-info.dk/info/battery%20protection%20UK.html

81

Thank you HKJ! :beer:

82

Does anyone know where I can get buttontop plates (and I guess the plastic insulating rings) so I can rewrap flat tops to button tops?

83

If you had the spot welder needed to attach the buttons you'd surely already know where to get them.

84

Just make a small solderblob on the top.

85

Some AA batteries have “removable” button tops. “Removable” because they are technically welded on with two tacks. Be careful unwrapping old AAs, an unwrapped cell is easier to short out in the trash bin than one with its wrapper intact.

You can make your own insulator rings with scissors and a paper holepunch.

I rewrapped my first cell a few weeks ago, using a method just like tatasal described in #76 a few posts up: Tutorial: Rewrapping a battery

hair dryer was enough to do most of it, used a lighter to tighten up the two creases down the side, and a few parts on the ends that didn’t shrink enough.

86

I used precut lengths of wrap from Illumination Supply (illumn.com) and hit one difficulty at first try. The groove behind the head of the unprotected pack pull batteries I was rewrapping is deep enough so if the shrink wrap is heated too much it shrinks excessively and splits when it shrinks into the groove. Very little shrinking is required which means minimal heat and taking care.

87

Richwouldnt - I think I’ve also had shrink split at that groove at least once.

88

Thanks for posting! :smiley:

89

Thanks for the post. I just did a 12 pack of eneloops with a candle. Very easy to do.
The candle was nice because it is fairly consistent heat and I could hold the battery with both hands. Super easy and they came out nice. Just hold it above the flame a good distance and move the battery quickly.

90

Just a tip:
I’m using translucent shrinkwrap and put the label with brand/type/capacity underneath the wrap.
That way the label can never get loose or become unreadable through use.

91

very useful tips in here, I just bought a bunch of supplies over at fasttech and will follow the ideas on here.

thanks.