What to do with a lead-acid car battery?
I recently bought a new car, but it came with a cheap, undersized battery. For the engine Start-Stop function to work, I had to get a larger AGM battery. Now I have the old one as a spare.
What can I use a 12V, 510A, 62Ah lead-acid battery for?
EDIT: One more idea would be some kind of e-assist project for a bicycle or bike trailer. |
Unfortunately, a starting battery isn't really all that useful. You can't deeply discharge it without significantly reducing the life of the battery.
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I use batteries like this for my electronic work. I do fuse it, but what you have is a virtually unlimited current source at a voltage that never changes.
For + - ground supply, I hook up two batteries in series and now have a ground in the middle with a + and - 12 volt supply. FAR better than commercial power supplies - and the price is right. Some solid state stuff, especially analog, wants a very stable power supply. Bread boarding and prototype with the above configuration makes it a LOT easier as I don't have to be concerned with the stability and cleanliness of the power (no spikes, no high frequency "fuzz" - just pure DC at it's best. Steve Happy new year! |
Find a used UPS that takes a single 12V battery and just connect it.
Upgrade your UPS! (with some car batteries...) |
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A starting battery is just that. Was designed and tailored for just that. Put it on a buy and sell and use the money for other things. There are other things at play here that will render the battery useless to anyone and affecting its value to someone that needs a proper starting battery
It seems a lack of a quick discharge followed by a complete charge is not unlike exercise to extend the life. Sitting around and self discharging with the odd recharge is highly detrimental to a reasonable battery longevity Randen PS an investment in lithium with a battery management system is absolutely golden for any energy necessary experiment or toy. Lead acid is an absolute waste of time!!! Like screwing around with a film camera!! |
Keep it as a spare.
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Update - I bought a small inverter as a backup in case of blackouts.
I checked that the battery is still in good enough shape to power the refridgerator or heating system's pump and electronics for at least 4 hours. |
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