Maxled 65 LED Light Replacement Battery 4.8V 1500mAh

Maxled 65 Series — 4.8V Ni-MH Replacement Battery (138254 / 138255 / 290253)

This is a 4.8V, 1500mAh Ni-MH replacement battery for the Maxled 65 portable LED light and its compatible variants including models 138254, 138255, and 290253. It slots into the same battery bay as the original cell and connects to the same charge and driver circuit. Capacity is 1500mAh at 7.2Wh — use the product data figure, not any third-party listing.

• 65 series compatibility: These models share the same 4.8V battery rail, connector pitch, and LED driver input range. The housing dimensions — 51.10 x 28.60 x 28.50mm — match the original cell pack exactly, so no modification is needed to fit the battery bay.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a 4.8V Ni-MH platform. The BMS held charge acceptance cleanly across the full cycle, and the LED driver received consistent voltage without dips that would trigger early dimming protection.
• First-cycle brightness calibration: Run the light on medium brightness for the first full charge-discharge cycle. This lets the LED driver calibrate current output against the new cell's internal resistance before you push it at maximum brightness settings.

LED work light dimming before the battery indicator shows low

The Maxled 65 LED driver reduces current draw before the battery actually reaches its BMS cutoff threshold. This is intentional — the driver steps down brightness to protect the LED from undervoltage flicker, which happens at a higher voltage than the BMS trip point. So the light dims while the battery gauge still reads partial charge. This is normal behaviour and not a fault with the battery or the driver circuit.

Light not reaching full brightness after fitting the replacement battery

Ni-MH cells ship in a partially discharged state and the LED driver on the Maxled 65 requires a minimum input voltage to unlock full brightness output. If you fit the battery and run it immediately at maximum, the driver limits current because the cell voltage hasn't reached its nominal 4.8V yet. Charge the battery fully before first use — a full charge on a 4.8V Ni-MH pack should bring cell voltage to approximately 5.4–5.6V at charge termination. Once fully charged, full brightness should restore on the next power cycle.