Do you have any specs on the battery? The manufacturer usually has a website the provides more information then most people want to know about a battery, but they also define charging characteristic and give example circuits...
Is it NiCd/NiMH, lithium maybe? Capacity? Charge from what, mains?
Rechargeable coincells are almost always lithium (hence their 3 volt rating) Keep in mind the energy density of a coin cell is pretty horrible, in the neighborhood of 50ma's depending on the exact cell size and the internal resistance is very high.
hi..
i need to build a circuit on detecting underground cable fault. It have to be cheap, portable and efficient design.can any1 help me with it.
thank you
hi..
i need to build a circuit on detecting underground cable fault. It have to be cheap, portable and efficient design.can any1 help me with it.
thank you
Do you have any specs on the battery? The manufacturer usually has a website the provides more information then most people want to know about a battery, but they also define charging characteristic and give example circuits...
Is it NiCd/NiMH, lithium maybe? Capacity? Charge from what, mains?
i have a llok at the battery and discovered that it was 3.6v and not 3v and yes it will be charging from the mains. i also found the data sheet... after a while of searching.
The circuit's 300mA would cause a little lithium coin cell to burn.
You don't want to be near a lithium fire that burns white hot like magnesium (flares).
If you know what you are doing then you can make a current regulator at the battery's recommended charge current and a charge shutoff circuit that detects 4.2v.