YB10A-A2 Universal Power High Performance wet cell is not an ordinary replacement battery but a specially designed rugged and powerful glass mat battery. The Universal High Performance batteries typically offer true higher cranking amps and additional reserve capacity as compared to other replacements batteries. These batteries are shipped in specially designed packaging which includes the correct amount of electrolyte; end user must add electrolyte and activate battery. Offering vibration resistance and low internal discharge rate, you will achieve longer physical endurance and superior off-season storage potential. However, for long-term storage (30 days or more of non-use) we recommend a maintenance charger.BatteryStuff.com offers Universal Power high quality, high performance batteries at a discount rate, so you never have to overpay for a battery again!