Review on RadioShack 1W Solar Panel 9V 4.33" x 3.15" x 0.125" ⚡ + 20cm Output Cable 2770050 DIY Mini Solar Power System Cell Battery Charger by Tim Hull

Attention! This device is for hobbyists >> has NO blocking diode. If you are building a solar airplane or a ground vehicle. It does not matter. You want 100% of what he can give. You need a blocking diode to charge the battery, otherwise your battery pack will supply around 12 mA around the clock. Just drain your 175mAh DC 8.4V battery while you sleep. Now RS "still" suggests that we're a bunch of fools I guess. Didn't even mention the lack of a blocking diode. Next I put a 3 cent 1N4007 in the circuit. and got 0.00 ua power at 22,000 meters. Vfwd might cost you up to a volt, but super fast baby schottkeys are pretty limited in forward current. Many devices use a 9V battery only to regulate to 5.0VDC or even. 3.2. resulting in an enormous supply voltage range. But even with a margin, you don't want to upset him. I measured a little under 12mA with no blocking diode, in principle. immense in microamps, with a simple 1N4007 base in series. Hope this helps you young/new guys. built the 8080A in '76. For your health!