New Dell Y4991 battery usually comes in a discharged condition and with very low capacity.It is generally recommended to fully charge new battery before use. New Y4991 battery needs to be circulate(fully discharged and recharged 3-5 times to reach its optimum performance.)
High quality and long life Dell Y4991 battery!
Strict Li-ion battery circuit management.
Built-in rechargeable battery protection circuit.
100% OEM compatible stable performance, and guaranteed to meet or exceed OEM specifications.
The Dell Y4991 battery is the best replacement.
Lithium Ion (Li-Ion) Dell Y4991 battery don't suffer from the memory effect at all.
Our certification: CE, CCC, ISO9001, ISO9002, UL, RoHS, CUL.
Laptop Batteries usually comes in a discharged condition and with a very low capacity. It is generally recommended to fully charge new battery before use. Refer to the user guide of your electronic device for charging instructions.
A new dell Y4991 battery needs to be circulated (fully discharged and recharged ) three to five times to reach its optimum performance.
Rechargeable Y4991 battery will undergo self-discharging when left unused. It should always be stored in a fully charged status and kept in a cool, dry and clean place.
New dell laptop battery is sometimes hard to be charged. Your electronic device may indicate a fully charged condition for about 10 to 15 minutes when the new battery is being charged for the first times.When this happens, remove the Y4991 battery and let it cool down for awhile. Repeat the charging procedure again. When Dell Y4991 battery is unable to charge, it is suggested to remove the it from the device and reinsert it.
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