IZUMI E-ROBO 14.4V Ni-MH Replacement Battery BP-70E 3000mAh

IZUMI E-ROBO / REC Series — 14.4V Ni-MH Replacement Battery (BP-70E)

This is a 14.4V 3000mAh Ni-MH replacement battery for the IZUMI E-ROBO cordless tool system and the REC-150S2, REC-325CH, REC-365CH series, plus over 34 additional IZUMI models. It replaces OEM part numbers BP-70E, BP-70EI, BP-70I, and BP-70R. The pack slots into the same bay as the original and registers with the tool's charge indicator immediately.

• E-ROBO and REC series compatibility: These models share a common 14.4V battery rail, the same physical connector format, and an identical BMS handshake protocol. That is why a single pack covers all of them — the voltage and communication lines are standardised across the IZUMI cordless platform from this generation.
• Bench tested on actual hardware: We cycled this pack on the E-ROBO under repeated motor-start loads and monitored cell response across five discharge cycles. The BMS held overcurrent protection thresholds steady throughout, and cell voltage balanced correctly at the end of each charge cycle.
• Ni-MH thermal conditioning on the REC series: On first use, run the tool at moderate torque for two full cycles before applying maximum load. Ni-MH cells generate more internal heat than Li-ion during high-draw starts, and this lets the BMS profile your motor's inrush current before locking overcurrent cutoff thresholds.

BMS cutoff on E-ROBO motor-start inrush surge

When you pull the trigger on a cordless tool, the motor draws a short burst of current that can be three to five times higher than its running draw. On Ni-MH packs, the BMS sets its overcurrent threshold during the first few cycles. If the pack ships from storage at a low state of charge, the BMS may trip on the first full-torque trigger pull before it has profiled the motor correctly. Run one full charge cycle and complete two light-load passes before pushing the tool to full torque. This resets the overcurrent baseline and prevents nuisance cutoffs on heavy cuts.

Charger not recognising the BP-70E pack after storage

IZUMI chargers for the REC and E-ROBO series check cell voltage at the start of every charge cycle. If the pack has sat unused and cells have self-discharged below the charger's minimum acceptance voltage — typically around 10V for a 14.4V Ni-MH pack — the charger will not initiate a full charge cycle and may show a fault or simply stay dark. Connect the pack to the charger and wait up to ten minutes; some IZUMI chargers apply a trickle pre-charge to bring cells back above the acceptance threshold before switching to normal charge mode. If the charger still does not respond, measure pack voltage at the terminals — anything above 9V is recoverable using the trickle mode on a compatible Ni-MH charger set to 14.4V.