Free Battery Charger

So my garden light failed and I wanted to salvage as much as possible.

Old garden light
Old rechargeable batter
A diode
Wire

Wire the circuit, use any diode as shown in schematic.

Re use solar panel from bad solar light. Tie down the wires so they don't came off the solar panel.

Use rechargeable battery 4 volts DC, I would think it will work with any rechargeable battery from 1 to 4 volts. I still need to test it for voltages other than 4 volts

Assemble and put outside to charge and recharge your batteries.