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FAQs: Laptop Battery

1. New Laptop Battery isn't charging. Is it defective?

- Generally new Laptop batteries come in a discharged or sleep mode condition. It must be conditioned to operate at its full capacity by charging & discharging. Fully charge/discharge battery up to 4 cycles before achieving full capacity.

- When charging for the first time, the Laptop may indicate that charging is complete after just 10 or 15 minutes. This is a normal with rechargeable batteries. Sometimes the Laptop charger will stop charging a new Laptop battery before it is fully charged. If this happens, remove the battery from the device and then reinsert it. The charge cycle should begin again. This is a normal condition to prime a brand new battery.

- Please check the Laptop BIOS interface. BIOS are generally set up to read an OEM (Original Equipment Manufacturer) battery. The replacement battery may not communicate effectively with the Laptop software. Please have the Laptop system BIOS updated and retry charging as normal. BIOS updates are available at the Laptop manufacturer’s support website.

- A new battery may cause the battery power icon on the Laptop to indicate you have a low battery condition. We recommend that you let the battery charge overnight in the Laptop. It may be necessary to remove and replace the battery and restart the Laptop with the battery installed in order for the Laptop to start up sequence to properly recognize the new battery.

2. How long do typical batteries last?

Lithium Ion batteries lose capacity to hold charge with every charge-discharge cycle. The life of a battery under normal use is around 500 charge-discharge cycles. The average Laptop should give you between 1½ to 3 hours of run time. Though the following various factors that affect a Laptop battery life.

- The Ambient temperature (20 -25C) at which it is used.

- Frequent full discharge harms the battery health. If a Laptop battery is discharged past the critical 3% level, the battery may not be able to be recharged again. A Laptop battery needs a small amount of power in it in order for it send communication back and forth with the Laptop to recharge the battery.

- High end graphic applications require more power and deplete battery faster. e.g. animation software, 3D games, high graphic application , playing of music or movies.

- Use of active peripherals drawing power directly from Laptop. e.g. LCD brightness levels , USB Pen drive, USB modem, External optical drive , external speakers etc.

3. Laptop Battery Care

- Use the battery at an ambient temperature between 20C to 25C.

- Avoid discharge below 3%.

- If Laptop is to be stored over 2 weeks, remove battery from Laptop and store separately.

- Do not expose to moisture, rain, or soak in water.

- Do not short circuit, disassemble, crush, drop, hit, puncture or otherwise abuse the battery.

- Keep away from fire, or other sources of extreme heat. This may result in explosion.

- Use battery only for its specified purpose.

4. When to buy a replacement battery required?

On regular battery use, the battery begins to fail the running time of the battery and full charge rate will begin to decline.

Ideally, when battery supplies less than 30 minutes or less of charge, it is time for a replacement. Li-ion Laptop batteries will wear out slowly over time on each charge-discharge cycle, providing ever shorter battery run times on every use.

5. Maximizing performance of Laptop battery?

- Ensure maximum performance of the battery by optimizing the Laptop power management features. Refer to the manufacturer’s manual for further instructions.

- Minimize use of battery power of the Laptop. Use the AC mains through Laptop adapter when ever wherever possible.

6. Battery capacity and how to measure it?

A Laptop battery has two ratings which are volts and Amp-hours (AH). The capacity is measured in Watt-Hours. Watt-Hours are calculated by multiplying the volts x milli amperes. (e.g. 14.8volts x 4400mAh ( or is also equivalent to14.8 x 4.4Ah = 65.12 Watt-Hours). Watt-Hours is a measure of energy which powers one watt for one hour. So, if the Laptop runs at 20 watts, the run time will be: 3.256 hours (65.12 Watt-Hours / 20.0 watts Laptop pc power use).

The higher a battery's amp hour rating is, the longer the battery's run-time will be.

7. Is it normal for a battery to produce heat while it is being used and while charging?

Yes. Laptop batteries produce heat when they are being charged and also when in use. Heat is a natural byproduct when energy is transferred within the battery.