HELP !! arduino solar panel battery and 2 motor servo

Ooh, i see paulS. I have another question.
When my servo sweeping based on ldr, i do serial println on my ldr in the same time, why the servo movement going to slow when i do this? But when i unmark the serial println the servo movement going back
to normal..

Anybody help me please with the schematics to charge and measuring battery on my
arduino..