UniBat says its prices average about 10 to 20 percent less than the competition’s (read: Yuasa) while offering superior quality and durability. To help reduce costs UniBat’s batteries are “non-factory activated.” That means adding acid—which comes in a pre-portioned package—yourself. You’ll also have to charge the battery. That may sound like a pain, but it means you get a totally fresh battery. A factory-filled and charged battery is convenient, but you have no idea how old it is or how long it’s been self-discharging on a shelf somewhere.