A previously covered emergency phone that lasts approximately 15 years on a single battery might have just met its match with the John Doe 'John's Phone' collection of colorful simple phones. These phones may not last 15 years on a single battery but do last up to three weeks on a single charge. Furthermore, they'll work with any SIM card the user has to offer.
The idea behind the John Doe John's Phone line of cellular devices is to give consumers a simple phone with no extra features that could cause battery drainage. Its simple design includes large keys and even includes a mini address book and pen that are removable from the back of the phone to quickly note numbers and information when needed.