i have a lavolta bps-305, i can get a chinese brand phone to work with it but when i try a blackberry curve and nokia lumia they dont turn on, yet they charge with the charger
how do we know how much should be voltage for other devices for example?Is there any proportion between voltage battery and dc voltage that we should set on
How to test if there is any charge in the battery? Once i left my mobile unused for several months. When i turned it on, it was not powering up. I went to local mobile service shop and the guy tested to battery to check if there is any charge in the battery. But i was not able to see his work desk in full and how he was testing the battery level. Is it possible to check how much battery is remaining using dc power supply? If not, what hardware is used for testing battery level?
for negative use your multimeter in beep mode and check which beeps with ground, for positive plug in the charger and try testing the voltage by alternating the probes till you get a positive reading of the approximate output voltage on the terminals, eg the voltage on the terminals might be 4.18v... if its -4.18v, then the terminal with the negative probe will be the positive terminal and vice versa.
Not certain about the points made but ,if anyone else needs to find out about learning computer repair try Saankramer Electronic Magazine System (just google it ) ? Ive heard some awesome things about it and my friend got excellent success with it.
