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Rechargeable Batteries

Hey everybody!

Trying to save some money and I am in need of some advise, leads, tips or what-have-you on AA, 9V, D and other rechargeable batteries and where to buy them. Applications vary from guitar amps and pedals that I will be building. Perhaps 3 18650s for 11.1 volts? 12v dry or gell cells... to flashlights and other small electronics. I need to do it as safely as possible, keeping in mind that some of these things like to mimic fireworks. Any help or thoughts would be most appreciated.

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Permalink Reply by Kigar on January 8, 2021 at 3:00pm

sorry for the duplicate, always struggle with this site!

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Permalink Reply by Southern Ray on January 8, 2021 at 3:30pm

Thank you for that very good info there. I appreciate that. Some more research to do. Thanks again!

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Permalink Reply by Keith Rearick on January 9, 2021 at 7:57am

Many options coming down the pike on rechargeable batteries. There is an adapter now, for the 18 to 20 amp tool batteries, that fishing people are using to wire the batteries up, to use for their electronics on boats. Then they carry a spare, when one runs down. This helps to keep bulky auto batteries out of the way, and all the wiring out of the way. So they can then have one battery up front, and one in back tucked up out of the way.

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Permalink Reply by Southern Ray on January 9, 2021 at 9:16am

Interesting. Thank you Keith!

Hope you are having a great weekend.

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Permalink Reply by Fergus Lester on January 9, 2021 at 12:00pm

I have ended up using a motorcycle battery for 1 to 20W amps. It's small enough to fit inside a small practice amp, is rechargeable and can delivery as much current as needed. For a less mobile solution in my shed I have 2 old car batteries wired to give me 12V or 24V at the bench.

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Permalink Reply by Southern Ray on January 9, 2021 at 6:44pm

Thank you Fergus, I had wondered about those little dry-cell or gel-cells. Thanks for that info. The mobile solution is the kind I like the sound of. Old school.

Thank you!

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Permalink Reply by John Sawyer on January 9, 2021 at 7:48pm

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Permalink Reply by Keith Rearick on January 10, 2021 at 4:46am

Another thought is the batteries for garden tractors, and are 12 volts. Would work well if for powering an 12 volt amp outside.

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Permalink Reply by Southern Ray on January 10, 2021 at 12:39pm

I hadn't thought of that one. Thanks again! Lot of options.

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Permalink Reply by John Sawyer on January 11, 2021 at 2:38pm

I don't know why this site and Chrome aren't friends... anyway:

18650 cells are awesome and quite safe, when used properly. A fully charged cell is 4.2v, and a discharged one is about 2.5. Go beyond these, and you permanently damage the cells pretty quickly. BMS boards are cheap and work well to manage the batteries.

I've run the ever popular 9v Footnote amp on 3 cells for many hours, they're awesome on 12v!

The other downside is don't solder to these cells.. the electrolyte is full of VOC's that shouldn't be heated up...

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Permalink Reply by Southern Ray on January 12, 2021 at 8:01pm

Thanks for that very useful info there, John. I'll check that Footnote stuff out a little better. later. A quick glancing search showed a couple of mentions that they were getting hard to find. Encouraging news on the 18650s and all the newly acquired info from all of you. Thank all of you.