Hp 520 Adapter Compatible original Part :

1. Carefulnessly read narrate book of battery,use commendatory adapter.
2. Research whether the electric appliance and the Hp 520 adapter contact elements is whether clean, when necessity clean with the wet cloth mop, after dry loads according to the correct polar direction.
3.When non-adult custody, don’t let the child replace the battery, compact battery like AAA should be placed at somewhere the child can't attain.
4.Don't mix up new and old batteries or put different model batteries together.
5. Don't try to make Hp 520 adapter rebirth use of hotting up, charging,or other way.
6. Don't let battery short circuit.
7. Don't hot up 520 laptop AC adapter or loss it in water.
8. Don't strip adapter.
9. Electro-adapter should be cut switch after use.
10.Should take off laptop from Hp 520 adapter when battery long time no use .
11.Adapter should be stocked in cool and dry places.

1) Adapter should be charged for 12 hours when you first get them.It is completely discharged at the time of purchase, and need a full charge before their first use.
2) Do not leave your adapter inactive for extended periods of time. Even if you use AC power most of the time, use the laptop AC adapter periodically to keep it in good condition. Unplug your AC adapter when the computer is not in use to prevent overcharging..