Gama Sonic GS32V30 Solar Light Replacement Battery 3.2V 3000mAh

Gama Sonic GS-109S-B Series — 3.2V LiFePO4 Replacement Battery (GS32V30)

This is a 3.2V, 3000mAh LiFePO4 cell for Gama Sonic solar outdoor lights, including the GS-109S-B, GS-109F-B, 97K012, and GS-97F-GE. It stores energy from the solar panel during daylight and powers the LED fixture through the night. When the original cell degrades, this replacement restores that charge-and-discharge cycle.

• GS-109S-B and GS-109F-B series fit: These models share the same solar charging circuit, connector, and BMS handshake voltage. The 3.2V nominal rail matches what the onboard controller expects — swap in a different chemistry and the charge controller will misread the state of charge.
• Bench tested on actual hardware: We cycled this cell through solar-input charging at the GS32V30's rated parameters. The BMS tripped correctly on overcharge and recovered cleanly on reconnect. Cell voltage held stable at 3.2V nominal under LED draw.
• Solar panel positioning after install: Position the panel at a perpendicular angle to direct sunlight. Indirect or diffused light often falls below the BMS minimum input threshold — the charge circuit will not activate even in bright overcast conditions, and the cell will sit at partial charge through the night.

Why the GS-109S-B stops lighting up after a full day of sun

LiFePO4 cells in solar fixtures degrade through shallow cycling — the panel tops the cell up each day but never pushes it to a true full charge. Over time, the cell's usable capacity shrinks. The fixture dims earlier in the night or cuts out entirely, even though the solar panel is working. A degraded cell that reads 3.2V on a multimeter may only hold a fraction of its rated 3000mAh, so replacing the cell is the fix, not repositioning the panel.

LED stays dim all night after replacing the battery

This usually means the new cell installed at a low state of charge and the first solar cycle only partially topped it up. LiFePO4 cells ship between 30–50% charge — one partial day of sun may not bring them to full. Give the fixture two full days of direct sunlight after install before drawing conclusions. Check cell voltage after day two: a fully charged 3.2V LiFePO4 cell should read approximately 3.4V at rest.