Rechargeable Lithium Battery Link
Since most rechargeable lithium batteries are 3.7 volts or multiples series thereof I found this article to be useful https://learn.adafruit.com/li-ion-and-lipoly-batteries/voltages
Forum Discussion
I had decided to buy another drill/driver set to get two new batteries for $99. I kind of had it in the back of my mind that with four batteries, I might get two failures and a repair by moving a good cell from one to the other.
Anyhow, one last call to Ryobi, explaining how their warranty is nonexistent in my area got to a sympathetic ear and she is sending me a new battery. They were out of the low end ones, so I get a higher capacity one instead. I promised to send the old one back, which will probably cost $30. No receipt needed because the date of manufacture is in the battery serial number. Now why can't they do this at Home Depot and avoid the cost of mailing both ways?
Anyhow, one last call to Ryobi, explaining how their warranty is nonexistent in my area got to a sympathetic ear and she is sending me a new battery. They were out of the low end ones, so I get a higher capacity one instead. I promised to send the old one back, which will probably cost $30. No receipt needed because the date of manufacture is in the battery serial number. Now why can't they do this at Home Depot and avoid the cost of mailing both ways?
