About this replacement
MAX Rebar PJRC160 / 34G808 — 25.2V Li-ion Replacement Battery (JPL925)
This is a 25.2V, 3000mAh Li-ion battery pack replacing OEM part JPL925. It fits the MAX Rebar PJRC160 and 34G808 cordless rebar cutters. The pack slots into the same bay and communicates with the tool's onboard BMS via the original connector and data line.
- PJRC160 and 34G808 platform fit: Both models share the same 25.2V seven-cell architecture, connector pinout, and BMS data protocol. A single pack design covers both tools without any adapter or modification.
- Bench tested on actual hardware: We cycled this pack through repeated high-torque cut sequences on the bench. The BMS managed inrush current spikes at trigger pull without tripping and held the voltage rail stable through the full cut cycle.
- Rebar cutter break-in: On first use, run the tool through two cycles at partial cutting load before going to maximum jaw force. This lets the BMS log the motor's inrush current profile and set accurate overcurrent thresholds before sustained heavy use.
BMS cutoff on trigger pull during rebar cutting
Rebar cutters draw a sharp inrush current spike the moment the jaw motor engages. If the BMS has not yet profiled that spike — common with a new or freshly charged pack — it can trip the overcurrent threshold and cut power instantly. This is not a faulty cell; it is a protection response. Run two partial-load cycles first, and the BMS recalibrates its threshold to match the motor's actual start current.
Charger not recognising the pack after job site storage
If the pack sat unused for several weeks, individual cells may have drifted below the charger's acceptance voltage — typically around 2.5V per cell. Most chargers will blink red or show no response rather than begin a charge cycle. To recover, place the pack in the charger and hold the charge button for five seconds if the unit has a manual wake function; otherwise, try a different MAX-compatible charger that includes a recovery or trickle-start mode, then verify cell voltage climbs above 3.0V per cell before normal charging resumes.