Honestly, I love the Light Rangers so much that I'm almost upset they didnt come with larger batteries! I brought 2 units out last camping trip. I left one with two sides lit and one with four sides lit for the weekend. The 10w solar panels were sufficient to charge the device with 2 sides lit but not the device with 4 sides lit. Was bitter sweet but i think i can survive happily with both units running 2 sides each. My only other feedback is to integrate red leds. They use less power than white leds and would render additional lenses obsolete. Thanks devos! -Tom