You’ve probably heard about the big stink over Apple slowing down older iPhones. The company says it did it to stop older phones, which have older batteries, from crashing.

As the phones age, the lithium-ion batteries age as well. And since those batteries do a ton of work, they often start to show age pretty quickly. The older they get, the more sensitive they get to things like temperature.

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There are a couple of tips that can extend the battery life of your iPhone. These tips aren’t only for iPhones, they apply to any device with a lithium-ion battery like a laptop or tablet.

 Watch the temperature.  Temperatures higher than 95 F (35 C) or lower than 32 F (0 C) can hurt your phone. Your device might crash or slow way down. The ideal temp is 62 to 72 F (16 to 22 C).  This also applies to battery storage.

If your phone or tablet is in a case, you may want to remove it before charging. Cases can cause some devices to get pretty hot while charging. You’ll also want to avoid direct sun exposure for your device.

Be careful storing. When storing your phone or laptop, make sure that the storage environment isn’t too cold or too hot. The battery power should be at around 50%. Storing fully charged can cause the battery to lose some charging capacity. Storing it with no charge can make it incapable of holding a charge. Make sure the device is powered completely down.  If you’re planning on long-term storage, take the device out every 6 months and make sure the battery is recharged to 50%.

Click here to read Apple’s explanation of why they slow down older phones and to learn more about why lithium-ion batteries lose power with age.