> I can't just plug a battery and check the current value. It will be tested > in the production and must be a fast method. The people that will make it, must just verify if > threre is a known current value. As the current depends on the battery voltage, i can't use it. > > Hi, I use a battery to verify the charger circuit. My Li-ion battery has a voltage range of 2.7-4.2 V... Below this it is depleted. All battery that is this range is charged with a 1C (fast charge). If the battery has a voltage near 4.2V => current decrease. So, you can use a battery to verify your circuit. You must just use a not completely depleted and not very charged battery. We use a simple circuit, that discharge the battery to the needed level of voltage. And it's ok. A cicuit to emulate the Li-ion battery is very complicated and is costly. Hope, it is will help you. Artem -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist