Kyle Wiens, writing on iFixit’s weblog:
Effective immediately, we’re cutting the prices on all of our DIY battery install kits to $29 or less as well. The kits include all the tools you need to open up and swap your own battery. We also have options for the iPhone 4S, 5, 5s and 5c — which are excluded from Apple’s new program.
I might purchase one of these battery replacement kits for my wife’s iPhone SE. The device isn’t as snappy as it once was and I’m almost certain the battery is to blame.