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Battery For Compatibility by Model smart pocket WiFi battery fxpr2/pr2L Capacity: 3000mAh Output Voltage: 3.7v Model smart pocket WiFi battery fxpr2/pr2L How to properly charge a phone battery How often should you charge a phone's battery, and will charging it to 100 percent reduce its lifespan? We round up the best battery care tips to keep your smartphone's battery healthy for as long as possible. Batteries are one of tech’s most boring subjects… until your phone, tablet or laptop dies. Here are our top battery tips and tricks to get the best battery life you can. While most of us live in fear of a fading phone battery when we’re out and about, we don’t worry too much about that battery’s eventual lifespan (probably between three and five years). But there are ways to keep your battery in tip-top shape for a long and fruitful life. Batteries do not enjoy eternal life. Most smartphone manufacturers say their devices rate their batteries at 300-500 cycles. Apple claims that its laptop batteries reach 80 percent of their original capacity after 1,000 charges. After this point batteries aren’t able to hold as much electricity and will power your device for increasingly shorter periods of time. So here’s some tips to extend your battery’s lifespan, be that in an iPhone, Android phone, Windows phone, tablet, or laptop. The big questions about how to re-charge a battery is whether you should let it run to zero before re-charging to 100 percent. One reason why people are unsure is something they’ve heard of called the battery “memory effect”. At what percentage should i charge my phone? The rule with Li-ion batteries is to keep them 50 percent or more most of the time. When it drops below 50 percent top it up a little if you can. A little a few times a day seems to be the optimum to aim for. But don’t charge it all the way to 100 percent . It won’t be fatal to your battery if you do a full recharge - most of us are forced to do this every now and again in emergencies. But constantly doing a full recharge will shorten the battery’s lifespan. So a good range to aim for when charging a Li-ion battery is from about 40- to 80 percent in one go. Try not to let the battery drop below 20 percent.