Ryobi 14.4V Ni-MH Drill Battery 3000mAh B-1442T

Ryobi CBI1442D Series — 14.4V Ni-MH Replacement Battery (B-1415-S / BPP-1417)

This is a 14.4V, 3000mAh Ni-MH replacement battery for Ryobi 14.4V cordless tools. It fits the CBI1442D compact drill/driver, CDL1441P, CID1442P, FL1400, and over 20 additional Ryobi 14.4V models. It cross-references OEM part numbers including B-1415-S, B-1442T, BPP-1417, and 1400144 among others.

• CBI1442D and CDL1441P platform fit: These tools share the same 14.4V battery rail, connector footprint, and BMS handshake protocol. A single replacement battery services the entire platform — drill, impact driver, and light construction variants — without adapters or modifications.
• Bench tested on actual hardware: We cycled this pack through full charge-discharge sequences on a 14.4V Ryobi platform. The BMS held stable voltage under motor-start inrush loads, and cell balancing tracked correctly across all discharge curves without triggering overcurrent protection.
• Ni-MH break-in on high-torque drills: Run the drill at half load — light drilling, no hammer function — for the first two charge cycles. This lets the cells form properly under controlled current draw before you apply maximum torque. Skipping this can cause premature capacity drop in the first month.

BMS overcurrent trip on motor-start inrush in the CBI1442D

When you pull the trigger on a cordless drill, the motor draws a spike of current — often three to five times its rated running load — in the first fraction of a second. On a new or recently stored Ni-MH pack, the BMS may read this spike as a fault and cut power before the motor reaches operating speed. This is not a faulty battery. The BMS threshold calibrates itself over the first few cycles as it maps the motor's inrush signature. After two full charge-discharge cycles under normal load, the trip threshold settles and trigger-pull cutoffs stop.

Tool bogs under load and voltage drops mid-task

If the drill loses torque when driving into hardwood or decking, the cause is voltage sag — the cell voltage drops under sustained current draw faster than the motor can compensate. On Ni-MH packs, this is often worsened by corroded or high-resistance terminal contacts on the battery seat. Clean the battery contacts and tool terminals with a dry cloth or fine abrasive, then check that the pack seats fully with no play. If sag continues after cleaning, load-test the pack — a healthy 14.4V Ni-MH should hold above 12.8V under moderate drill load.