To better use your SONY PCG-N-B90PSYA battery, please take care of the precautions listed below :
1. The simplest and most obvious way of getting the maximum life out of PCG-N-B90PSYA battery is to ensure that it always works well within its designed operating limits. There are however some further actions which can be taken to increase the battery life.

2. Do not modify or disassemble SONY PCG-N-B90PSYA battery, as the materials inside may be toxic and may damage skin and clothes.

3. Caution must be given to prevent accidental short-circuiting of SONY PCG-N-B90PSYA battery.

4. Avoid placing batteries in water or other moist device, as this may cause the battery to fail.

5. Never insert SONY PCG-N-B90PSYA battery with the positive and negative poles reversed as this can cause permanent damage to the battery which may swell or rupture.

6. Never charge with an unspecified charger or specified charger that has been modified. This can cause breakdown of SONY PCG-N-B90PSYA battery or swelling and rupturing.

7. Never reverse charge or overcharge with high currents (i.e. higher than rated). Doing so causes rapid gas generation and increased gas pressure, thus causing batteries to swell or rupture.

8. Do not place SONY PCG-N-B90PSYA battery in device for a long period of time if device is not being used.

9. Store SONY PCG-N-B90PSYA batteries in a cool place and when in use don't allow them to remain in environments which may be subject to overheating.

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