http://www.uk-online.co.uk/VGP-BPS33-battery-replacement-178846.html 
Brand New Battery For Sony VGP-BPS33, laptop battery specifications(Li-ion, 3760mAh/43WH ,11.4V), lowest price and 30 days money back, 1-year warranty. 100% compatible with SONY VAIO SVT-14 SVT-15 Touchscreen Ultrabooks.
SONY VGP-BPS33 Replacement laptop Battery [3760mAh/43WH, 11.4V]
Replace the following part numbers:
VGP-BPS33
Fits the Following Models:
SONY VAIO SVT-14 Touchscreen Ultrabooks
SONY VAIO SVT-15 Touchscreen Ultrabooks
SONY Vaio T Series
SONY VAIO T Touchscreen Ultrabooks Series
SONY VAIO T14 Series
SONY VAIO T14 Touchscreen Ultrabooks
SONY VAIO T15 Series
SONY VAIO T15 Touchscreen Ultrabooks Series
Q:How do I extend the life of my laptop battery?
- + New Sony VGP-BPS33 Battery Pack must be fully charged before use.If you don’t use your laptop for a period of time,you must fully discharge then recharge the Sony VGP-BPS33 battery.
- + Always use a laptop on a hard surface. Don’t put it on your lap (despite its name) or on thermal insulating materials such as cushions. If you like to work in bed with your laptop, I recommend using a laptop table. I have this one, and I am quite content with it.
- + Try to avoid charging the battery while you are working with the laptop. Charging the Sony VGP-BPS33 batteries increases your laptop’s temperature. The problem is that the CPU, the graphics card and the hard disk also heat up your laptop, which adds to the temperature increase experienced when charging the Sony VGP-BPS33 battery. Many vendors deliver their laptops with software that allows you to disable charging. You also can remove the Sony VGP-BPS33 battery while you are working on AC current.
- + Make sure the laptop’s ventilation can always work properly. Don’t place objects before the ventilation systems opening. Don’t run or charge the laptop while it is in its case.
- + Don’t leave the laptop in the car or under the sun in summer. Use a bike. It keeps your 3760mAh/43WH 11.4V SONY VGP-BPS33 laptop battery cool and your own battery healthy. And too much sun exposure causes only skin cancer anyway.
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Teach you how to do here:
1. When first time using Sony VGP-BPS33 battery, Please carefully read the user manual about Battery maintain parts.
2. Please fully charge at most 12 hours in first Sony VGP-BPS33 battery charge time. Bcause it is need three/four times for charge/discharge cycles to get the maximum capacity of battery.
3. If without using notebook long time(more than 3 weeks) or found that your Sony VGP-BPS33 battery charge/discharge time become shorter and shorter, you have to fully discharge the battery before next time charge again.
4. It is better to keep the laptop power off during charge the Sony VGP-BPS33 battery pack. And don’t unplugged power or using your notebook during the battery half-way charge. The best time using is 30 minutes fully charge later.
5. Keep your Sony VGP-BPS33 battery far away from damp,exposure,and erosion some chemical liquids and others to avoid making battery short-circuit.
Batterijen Sales Nederland / België Sony VGP-BPS33 ACCU >> SONY ACCU
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