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Repalce Sony NP-BN1 Battery 3.6V 1100mAh
Do I need extra or backup batteries?
Probably you do. Batteries are arguably the most important portable electronic device accessory. For example, unlike traditional cameras, which can often go months without needing a battery replacement, some digital cameras can consume power at an alarming rate, providing no more than a few hours of continuous shooting time before the battery is drained. Other digital devices like PDA, laptop, etc have the same situation as well. Knowing how you intend to use your camera and what type of battery it needs is key to making an informed purchase. To our experience, 90% of portable electronic device users keep at least 1-2 extra or backup batteries, especially when traveling or having a heavy-duty outdoor job on the devices. Thus we suggest you be always prepare a few backup batteries in case that you really need to use the device when it happens to run out of power.
Why my new battery won't hold a charge?
1) Your battery might be loose. Please check the connection between the battery and the device to be sure the battery is securely attached.
2) Some devices come with multiple batteries. You may also want to try to charge an alternative battery in the device or charger. If you have already checked both of above and still had troubles to charge the battery, either your battery or your charger/device should have problems.
Why my new battery has a very short running time even "fully" charged?
New batteries are supplied in a totally uncharged state. To ensure maximum battery performance, a new battery (or battery that has not been used for several months) should be charged for at least 14 hours before use. When charging the battery for the first time, the device may indicate that charging is complete after just 10 or 15 minutes. This is a normal with rechargeable batteries. New batteries are hard for the device to charge; they have never been fully charged and not "broken in".To be completely and deeply charged, a new battery will require several full charge/discharge cycles in order to achieve its optimum performance. A new battery, or battery that has not been used for several months, may cause a premature fully charged indication as well. Ignore this indication and let the battery charge for several hours. Don't worry, it's perfectly normal.
How long do batteries last?
The general rule of thumb is between 600 to 1000 charge/discharge cycles for a NiCad or NiMH battery and 300 to 600 charger/discharge cycles for a Li-Ion one. This translates into battery life about 3 to 5 years of Nicad or NiMH and 1.5 to 3 years of Li-Ion for the average user at normal usage condition.