cwd10
Veteran
Location: PA, - U.S.A.
| Well yes you did everything right. The one thing you have to remember is that betteries have a reflex to charging/discharging. I'll explain. Say you just discharged a battery to what you think is fully discharged. If you measure the voltage when you remove the pack you may see 7 volts (just an example). If you wait a few minutes, and measure again you will see something like 7.18 volts. Wait a few minutes more and it will be about 7.23 volts. This is commonly referred to as bounce back, or reflex action. The same thing happens when charging, only in reverse. You just charged a 12 volt pack to 13.1 volts. after the charge is done, you let it sit a few minutes and it comes down to 12.8 volts. Get the picture? the same theory works for measured Milliamp hours. When you charged to 1251mah. and the charger stopped. The pack likely drifted down to maybe 1200mah. or so. When you charged again to 700ma, you had a total of about 1900. When you let the pack sit, it probably drifted down to about 1800 or so. There will be some discrepancy in the charger's accuracy, but it should be pretty close. The method you used is perfectly fine. Many times I have gotten more Mah's into a battery than it was rated for. If the battery can take this much charge without heating up, it just means it's very healthy. You didn't hurt your battery, you helped it last longer. Welcome to the magical world of battery physics.  |
