Where to find this NiMH battery pack? - Page 1
Forum section: electronics / general

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 09:22:57 am
content: Hi guys,I think the internal battery of my bike's alarm is dead... the multimeter say around 1V!Where can I find in Italy/Europe this battery pack, a compatible one or 6 buttons battery to re-pack it?I was thought it was much simple but I can't find it...

author: mariush
author_rank: Super Contributor
timestamp: November 26, 2018, 09:39:33 am
content: Are we supposed to guess the battery type, shape, voltage, anything?At the very least take some pictures of your current battery or give some info about it.

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 09:43:12 am
content: Sorry! Forgot the attachemnt....

author: mariush
author_rank: Super Contributor
timestamp: November 26, 2018, 10:05:56 am
content: If you search for 80BVH you'll find plenty. That's the code for a single battery in the 6-pack.80BVH is apparently 15.5 mm diameter , 6.3mm tallfarnell has 15.5mm x 6mm individal batteries but they're expensive AF at 6 pounds each :https://uk.farnell.com/varta/55608603059/rechargeable-battery-1-2v-70mah/dp/2917048TME.eu has slightly smaller 40 mAh batteries at a more reasonable price (2$ per battery) :https://www.tme.eu/en/details/accu-v40h/rechargeable-batteries/varta-microbattery/55604101501/you can solder or spot weld 6 of them and you get a working battery.

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 10:15:43 am
content: Thank you so much man!I think I'll open the original pack so I can have a look at the exact coin battery

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 12:32:22 pm
content: I found this item so I decide to buy couple of them and try to re-pack and pack like the orignal ones.https://www.ebay.it/itm/291645186789Any suggestion on how to unpack and solder/pack so that I'll have 6 battery as the original?Thanks!

author: NiHaoMike
author_rank: Super Contributor
timestamp: November 26, 2018, 01:46:02 pm
content: Is there room to fit a bigger battery? Like a 9V NiMH?

author: dexters_lab
author_rank: Unknown
timestamp: November 26, 2018, 01:53:29 pm
content: looks to be a slightly custom version of the GP Batteries model 80BVH but with 6 cells in, hence the x6:http://www.blubatterie.it/pdf/Ita_GP_Professional_2011.pdfyou should be able to re-make a new pack with replacement cells but the inter-battery connections will be spot welded to keep it slim... you might be able to solder them but you will have to be careful. Copper braid (like de-soldering braid) is a good option for connecting them together.

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 01:57:43 pm
content: thanks guys for all the information.I've ordere the battery and I'll try to re-pack... the interconnection is what I think will be not easy so if you have any suggestion, please let me know!

author: CatalinaWOW
author_rank: Super Contributor
timestamp: November 26, 2018, 05:56:35 pm
content: As a couple have suggested, spot welding is the right way to do the interconnect. The key is to minimize heat into the battery, which spot welding accomplishes. If you want to spot weld yourself, search this forum for spot welding or google it. It will take some time and effort (or equivalent money) to set up for this and get welding parameters right.In the US there is a chain called Batteries Plus which is set up to do this work. I would be surprised if there isn't a similar business in your area. That would be the surest way to get good results. They will likely not be cheap, but a few ruined cells can run up the cost of doing this yourself.It is possible to solder the cells together, but it isn't easy. It is easy to ruin batteries in the attempt. I have had best luck with lots of flux and a hot iron. There might be an optimum solder composition, but I can't help there. What I have used is the old standard 60-40 lead tin.

author: Markino
author_rank: Contributor
timestamp: November 26, 2018, 08:06:37 pm
content: Thnaks guys for all the infos!!!That's really great forum!