This is a replacement battery for your laptop for backup functionality, The laptop battery is made to meet required specifications and provide adequate power for your laptop; the battery does not suffer from the memory effect. The battery also has internal circuit boards with smart chips, which allows the battery to communicate with the laptop to monitor battery performance, output voltage and temperature

• The Dell Latitude D620 Laptop battery is compatible with the following Laptop models
• Dell Latitude D620,
• Dell Latitude D630,
• Dell Latitude D630 ATG,
• Dell Latitude D630 UMA,
• Dell Latitude D630c,
• Dell Latitude D631
• Dell Latitude D640
• Dell Precision M2300

This is a replacement battery for your laptop for backup functionality, The laptop battery is made to meet required specifications and provide adequate power for your laptop; the battery does not suffer from the memory effect. The battery also has internal circuit boards with smart chips, which allows the battery to communicate with the laptop to monitor battery performance, output voltage and temperature  

Replacement Dell batteries need breaking in: fully charge the notebook battery, discharge it down to 20% remaining and then 

Do not impact, drop, crush, pierce, throw or hit your Dell laptop battery pack, as it can damage the battery cell inside.

Lithium Ions can be ruined if the voltage drops below a certain level, avoid letting your notebook battery drain completely and repeatedly.

Do not store your Dell laptop away for extended periods with the battery attached. Please remove the replacement Dell battery pack from the notebook before storing it away.

Fully charge/discharge battery up to 4 cycles before achieving full capacity of a new battery.

Fully discharge and then fully charge the replacement Dell laptop battery every two to three weeks for battery conditions