About this replacement
Shark CH701 / Cyclone PET / CH700WM — 7.4V Li-ion Replacement Battery (CH700-2S1P)
This is a 7.4V 2600mAh Li-ion battery pack for the Shark CH701, Cyclone PET, and CH700WM cordless handheld vacuums. It replaces OEM part number CH700-2S1P. The pack slots into the vacuum's battery bay and powers the motor directly — no tools required to swap.
- CH701, Cyclone PET, and CH700WM compatibility: These three models share the same 7.4V two-cell series configuration, identical battery bay dimensions, and the same BMS communication protocol. One pack covers all three.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the CH701 platform. The BMS handled motor start-up current draw without tripping, and the cell voltage held stable across repeated suction cycles under load.
- Dock charging on cordless handhelds: Do not leave the vacuum sitting on the charging dock permanently. Continuous trickle charge is one of the fastest ways to degrade Li-ion capacity in this class of device. Charge to full, then remove from the dock until the next use.
Suction dropping before the battery indicator reaches low
This happens when the motor draws more current than the BMS expects — usually caused by a partially blocked filter rather than a failing battery. Restricted airflow forces the motor to work harder, pulling current above its rated draw and causing voltage to sag at the cell level. The BMS reads this as a low-voltage condition and throttles output before the indicator LED registers it. Clean or replace the foam and HEPA filters before swapping the battery pack.
Motor cuts out mid-use then recovers after a short pause
This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, clogged inlet, or heavy carpet load — current spikes past the BMS cutoff threshold and the pack shuts output momentarily. Letting the vacuum sit for 30 seconds resets the BMS and restores power. Clear the blockage completely, then check that the filter is seated correctly. If the cutout repeats on a clear airpath, measure pack voltage under load — a healthy cell at 7.4V nominal should hold above 6.8V during motor start.