FOCUSTEC HS04 HS03 41Wh 14.8V 4-cell laptop battery

41 Wh 4-cell lithium-ion replacement

This 41 Wh lithium-ion battery uses four cells at 14.8 V to restore runtime on compatible HP notebooks. It matches the original 2600 mAh capacity and fits models such as the 240 G4, 250 G5, Pavilion 15-ac and 17-x series. The pack is built with Class A cells rated for up to 500 recharge cycles. CE and UL safety testing plus built-in circuit protection guard against over-charge and short circuits.

Sustained discharge and cycle life

Under continuous load the cell chemistry maintains stable voltage without the sharp drop seen in aged packs. The four-cell layout spreads current evenly, keeping temperatures lower during long work sessions. Rated cycle life reaches 500 full charges, so daily charging remains viable for well over a year. Low self-discharge means the notebook can sit unused for weeks and still boot.

Upgrade from worn or lower-capacity packs

Owners replacing a depleted original battery regain the factory runtime without changing chargers or BIOS settings. The pack also supersedes any 3-cell variant that shipped with some configurations, adding roughly one-third more capacity. Buyers who need extended runtime beyond 41 Wh or a higher cell count will need a different form factor.