Streamlight Stinger Switchblade 3.7V 5200mAh Li-ion Replacement Battery 76805

Streamlight Stinger Switchblade — 3.7V Li-ion Replacement Battery (76805)

This is a 3.7V 5200mAh (19.24Wh) Li-ion replacement battery for the Streamlight Stinger Switchblade flashlight. It fits the Stinger Switchblade's battery compartment and matches the OEM part number 76805. The Stinger Switchblade is a tactical flashlight used by law enforcement, military, and emergency responders who depend on consistent output across demanding conditions.

• Stinger Switchblade platform fit: The Switchblade uses a single-cell Li-ion configuration at 3.7V nominal. The driver circuit and battery contacts are matched to this voltage rail — substituting a different chemistry or voltage trips the driver's protection circuitry and prevents normal mode cycling.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Stinger Switchblade platform. The BMS held the charge termination correctly and the driver stepped through all output modes without false low-voltage cutoff at the start of the cycle.
• Turbo mode draw management: Turbo mode on the Switchblade pulls significantly higher current than standard or low modes. Avoid leaving the light locked in turbo on a partially depleted cell — the driver will step down output aggressively as voltage sags, and repeated deep sags shorten cell cycle life faster than normal use.

Stinger Switchblade dimming before the battery indicator signals low

The Switchblade's driver uses brownout protection that steps output down before the battery indicator triggers. This is intentional — the driver reads cell voltage directly and acts faster than the indicator circuit. When the cell drops below roughly 3.2V under load, the driver reduces current to protect the cell even though the indicator may not yet show low. If the light dims noticeably in turbo or high mode but the indicator looks fine, the cell is near its usable floor under load. Switch to a lower mode to get remaining output, then recharge.

Stinger Switchblade runtime in turbo drops sharply compared to standard mode

Turbo mode draws five to ten times the current of standard mode, so the cell depletes in a fraction of the time. A 5200mAh cell has a fixed energy store — higher current draw burns through it faster and also increases internal heat, which further reduces effective capacity. This is not a battery fault; it is the physics of high-current discharge. If turbo runtime feels shorter than expected, confirm the cell is fully charged to 4.2V before use — a partially charged cell will show the gap even more sharply.