A student researcher has taken a jell and coated the inside of a lithium ion battery with it, that will enable it to cycle hundreds of thousands of times. The result is that if commercialized, there could be batteries that could last forever. It doesn't improve capacity, but it does eliminate the wearing out issue.
Leo says it isn't harmful at all, and Apple even sells an external battery for the iPhone 6/6s. In general with these charging cases, when you charge the case it will also charge the phone. On the Mophie cases, there's a switch for when you want to switch to the battery. When it comes to Lithium Ion batteries, though, the best thing to do is keep it charging. The battery will last longer if it stays charged vs charging and discharging. It's definitely not good to let it fully drain.
Leo says he can get lipstick sized chargers that contain 3350mAh batteries. Anker makes them for $10, and it charges via USB. It would fully charge it one and a half times. He can get larger ones as well that can charge the phone several times.
Joe's HTC Resound phone is about 5 years old now, and it no longer will charge. He's wondering what he should try next. Leo says he should probably get a new phone at this point. These phones aren't meant to be kept for as long as 5 years. With computers, we expect to keep them 5 years, but with phone manufacturers expect people to upgrade every couple of years. It could just be that the battery has reached it's limit for charge cycles. If he wants to get a new battery, Leo definitely suggests getting the battery from HTC.
Simon bought an iPad 3 and he's having issues with the battery dying out and recharging it. Could this be the cause of iOS 8.3? Leo says probably not. It's likely that the battery is just old and dying. Batteries from tablets have only 500 complete charging cycles. Once those are depleted, the battery needs to be replaced.
Mark is on his third HTC One phone. It keeps breaking and has lousy battery life. Leo says that is the most annoying thing about smartphones is battery life. It's awful. There are two ways that Android phone manufacturers have addressed it ... the first is Quick Charge, which will recharge your phone in about an hour. The other options is to choose an Android model that allows you to swap out a secondary battery. LG has the G4 and it's easy to open and replace the battery. In fact, LG offers a second battery in a kit with a mini sd card. The Samsung Galaxy Note IV is another.
Jane's laptop consistently freezes up when she's doing things. Can that be caused by the battery? Leo says one way to test it is to remove the battery and plug it in to the AC adapter. If that resolves the issue, then it probably is the battery. But the battery is one of those that either works or doesn't work at all. It could be the power supply that is failing.
Dave has seen a website that promises upgraded Lithium Ion batteries for better safety and to increase battery life. Leo says that once he sees a study that verifies the claims, he'll buy into it. Leo has seen a lot of promises on the internet over the years and very little in the way of delivery. It's definitely something that users want, but the proof is in the pudding.
Riley has a Windows 7 laptop and he's getting an error message that his battery should be replaced. Since Riley's laptop is about two years old, the time is about right for Riley to replace that Lithium Ion battery since they only have 500 fixed recharge cycles. So yes, Riley probably needs to replace the battery. If he keeps his laptop always plugged in, he'll be limiting the number of recharge cycles. He should only recharge the battery when he needs to for being out and about.
Tiff wants to know if it hurts the phone to keep it plugged in after it's done charging. Leo says it actually doesn't hurt it at all. Cellphones use Lithium Ion batteries and there's a limited number of full charge cycles. Keeping it plugged in when it's not being used preserves and improves the lifetime of the battery. It also has circuitry that prevents overcharging.