The Alien Motion AM4-XP is our smallest and lightest battery. Best used for 50cc scooters to 550cc multicylinder engines. For small engines, this battery offers stunning power for its size and huge bang for the buck. Guaranteed to provide better performance and provide several times the lifetime of the original battery with proper use and maintenance.

The Alien Motion AM8-XP is a favorite among our customers. We found a sweet spot between size, weight, cost, and starting power. Well suited for engines up to 1200cc 4 cylinder, 1000cc twins and personal watercraft, the AM8-XP is a serious workhorse. Its 60mm depth allows it to fit in spaces too small for most lead acid batteries, while weighing under 2Lbs.

The Alien Motion AM12-XP is is the largest model we offer in our classic cylindrical case design. This model provides 500 pulse amps of cranking performance while coming in well under 3Lbs. The increased capacity over the AM8-XP affords increased cold weather starting and longer usage in total loss applications.

The Alien Motion Heavy Duty AM16-01 is 16 cells of LiFePO4 power, in a practical, reasonably size case. This battery features increased capacity and starting power, with larger lower resistance terminals. The AM16-01 would be suitable for starting most Harleys or large V-Twins & snowmobiles. With a small footprint, less than 4 Lbs of weight, and over 400 pulse amps, this is a seriously versatile battery.

The Alien Motion Heavy Duty AM22-01 is is our largest battery in terms of cranking capacity but actually weighs less than our AM16-01. We utilize prismatic construction cells for lighter weight and greater power than our cylindrical cells. At under 4 Lbs, the AM22-01 will start the largest V-Twins up to 2500cc as well as many small engine cars with ease. This is a serious workhorse in a tiny package.