Designed for Cord Zero A9/A9/PLUS series (A905M/A907GMS, etc.) and EAC63758601/EAC63382208, with 25.55V and 2600mAh. 5second snapon installation, no tools required. Direct replacement to solve issues with old batteries. capacity and long runtime Three rate power cells deliver strong performance with a 500 cycle life (about 67% longer than ordinary batteries). Fully charged runtime: 2530 minutes in strong mode, 4550 minutes in standard mode. Suitable for cleaning 100200 square meters of space on a single charge. Ninelayer protection and durable design Builtin intelligent board provides nine layers of protection against overvoltage, overcurrent, overtemperature, short circuit, and more. Flameretardant shell and goldplated interface for reliable connections. Stable operation across a temperature range of 10 C to 45 C, safe to use. Convenient, intelligent and compatible Realtime battery indicator shows remaining power. Compatible with thirdparty chargers; full charge in 3 to 3.5 hours. Supports battery memory function on compatible models; no calibration required, plug and play. Practical use scenarios Medium to large home cleaning: delivers up to 4550 minutes of standard mode runtime for homes around 100200 square meters. Quick battery swap during ongoing cleaning: 5second snapon installation minimizes downtime and keeps cleaning uninterrupted. Flexible charging setup: use your existing charger for convenient ups, with a full recharge within about 3 to 3.5 hours.