New HP DM842A battery is a high quality replacement battery. It is guaranteed to meet or exceed original battery specifications. This new battery will hold time as long as charge than original HP DM842A laptop battery. These are quality made laptop battery manufactured with premium Japanese lithium cells. Li-ion batteries do not suffer from the memory effect. They generally last between 500-700 charge/discharge cycles.

This new HP DM842A battery is a rechargeable, removable, replacement battery designed to work with several models of laptops.This batteries is 100% compatible with your original battery and provide extended runtime with no 'memory effect'.

We warrant that the products sold in our website, other than explicitly stated, are 100% brand new and free from defects in material and workmanship.

All of our battery was rigorously tested for capacity, voltage, compatibility and safety to exceed original equipment manufacturer specification. All of our HP DM842A laptop battery have passed stringent quality assurance procedures to achieve international standards such as CE, UL Listed and ROHS certification. Factory direct price. You can reassure of purchasing it!

1. Use the correct recharging procedure for your HP DM842A. Only use the power cord that came with your laptop or an authorized replacement.
2. Follow correct maintenance for your battery when not in use. Don't leave it in direct sunlight, areas where it will be exposed to extreme temperatures such as car trunks.
3. Use your laptop's power management features. The system will run at lower processor speeds when enabling power management features and it will go into "sleep" mode faster when inactive.
4. Buy battery with internal processors such as Li-Ion batteries.
5. New Li-Ion battery must be fully discharged and then recharged every 2-3 weeks.
6. If you don't use your laptop for a period of time, you must fully discharge then recharge the HP battery DM842A.