Ricoh DB-43 Caplio 300G Replacement Battery 3.7V 1800mAh

Ricoh Caplio 300G / 500G Series — 3.7V Li-ion Replacement Battery (DB-43)

This is a 3.7V, 1800mAh Li-ion cell built to the DB-43 specification. It fits the Ricoh Caplio 300G, 400G Wide, 500G, 500G Wide, and more than a dozen additional Caplio-series compact cameras. Slot it into any compatible Caplio body the same way the original ships.

• Caplio 300G–500G series compatibility: These cameras share the same 3.7V single-cell architecture, DB-43 contact layout, and BMS handshake protocol — so one cell covers the full range without modification.
• Bench tested on actual hardware: We cycled this cell through the Caplio body charger and monitored BMS communication at each stage. The protection circuit triggered correctly at low-voltage cutoff and accepted recharge without fault flags.
• First charge cycle in the camera body: On first use, charge this cell fully via the camera body or OEM charger before shooting. Some Caplio bodies require one in-camera charge cycle to calibrate the battery-remaining display to the new cell's discharge curve.

Flash recycling lag on a new DB-43 cell near end of charge

The Caplio 300G's flash capacitor pulls a sharp recharge current spike after each shot. As cell voltage drops toward 3.5V, the capacitor takes longer to reach full charge — you'll notice the flash indicator light staying on longer between frames. This isn't a fault with the cell; it's the camera's power management responding to lower available current at the tail of the discharge curve. If recycling lag becomes noticeable, check the battery indicator — at that point the cell is close to cutoff and a recharge is due.

Battery percentage jumping erratically on the Caplio display

The Caplio series maps voltage thresholds to its battery-remaining indicator using the original DB-43's discharge curve as a reference. A new replacement cell may have a slightly different mid-discharge voltage profile, causing the indicator to skip segments or read higher than expected before dropping suddenly. This is a display calibration issue, not a capacity problem. Run two full charge-to-cutoff cycles in the camera body and the indicator will track more accurately against the new cell's actual curve.