Small Case Lithium Battery The AG-401 battery, at a minuscule 4.25 x 1.25 x 3.75 inches (LxWxH to the top of the terminals), offers extreme power in the most compact size in Lithium Motorsport batteries. The AG-401 is best used for Performance applications where extreme weight loss and ultra-compact size are desired. Can start inline 4-Cylinder motors up to 600cc for race use, or up to 250cc for everyday street use in scooters. This battery is also a favorite of custom builders who want the smallest battery to tuck out of the way. Features Adhesive-Backed Foam Included for EASY INSTALLATION. Most Compact Lithium Motorsports Batteries available. Ultra-Lightweight and High-Power Lithium-Ion Motorsport Battery. Can hold a charge up to a year provided there are no “Parasitic Drains” (accessories that draw power when the bike is off (i.e. alarms, ECUs, iPods, GPS, heated grips, etc). Large all-brass terminal design. 3-Year Warranty (Click here to download warranty information) Best Uses Capable of everyday use in bikes up to 250cc. Race use for Enduro and MX electric start bikes up to 450cc. (If you have a 250cc 2-stroke you will need to use the Antigravity Battery AG-801) Race and Track Day use in inline 4 cylinder 600cc sportbikes (Honda CBR600 rider should use the Antigravity Battery: AG-801). Custom builds like cafe racers or small bore customs up to 350cc. (Please note if you use older classic bikes from mid-1980s and earlier you should update the charging systems to a modern voltage regulator; damaged voltage regulator can overcharge the battery and damage it.) Not for use with PWC.   * Lithium batteries can not be shipped by air.  UPS Ground shipping must be selected at checkout.