I have lead Acid Battery which I found in my old stuff I took it out and check the readings with my multimeter the battery is completely dead so I opened the caps of the battery and put few drops of distilled water and then tried to charge it but it didn't work so I took acid from my big 200amps battery and put in my dead battery the battery started working but after 3 hours of charge it is losing volts quickly and not able to power small little dc motor the next day I put some more acid in it the battery is now able to run the motor little bit but when I charge it the battery sounds like boiling and caps pop up and volts quickly started decreasing fast. It is 6v 4.5ah battery but it charges not 10v when I give 6v or 8v on my power supply it wouldn't charge when I give it 10v it started charging and it gets hot from it's positive side but negative side remains cold.
closed as off-topic by Leon Heller, Marcus Müller, winny, Andy aka, Marla Aug 17 at 13:46
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – Leon Heller, Marcus Müller, Andy aka, Marla