While the $550 Edge doesn't fold ... as well as 8GB of RAM and 256GB of storage. The 5,200-mAh battery lasts up to two days on a single charge, according to Motorola, though that'll be worth ...

Like all battery types, AGM batteries can have their share of problems, though, particularly if they are not properly maintained or as they age. The symptoms of a bad AGM battery aren't always ...