Genuine SUPER73 batteries. Choose the pack that matches your bike - the A-Series 3P for current A-Series models, or the S1 for the SUPER73-S1. A-SERIES 3P BATTERY - RUN TWO, RIDE FARTHER The A-Series 3P works two ways. Run it on its own as a spare or replacement pack on any A-Series bike - or run two of them at once for a dual-battery setup that roughly doubles your range. A discharge cable is included in the box, so no extra adapter is needed. On a dual, full charge you can expect up to 50 miles. Carrying a second pack also means you can swap on the fly: charge one at home while the other is on the bike, or throw the spare in a pack for a long day out. Which bikes can run two batteries? SUPER73-M1D / M1D SE - dual-battery capable SUPER73-B1G / B1G SE - dual-battery capable SUPER73-MZFT / MZFT SE - single battery only. The 3P fits and runs great, but the battery bucket doesn&';t have room for a second pack A-Series 3P specifications Voltage: 52V Capacity: 15Ah Watt Hours: 780Wh Weight: 11.5 lbs Discharge cable included (required for dual-battery setup) 3-Pin charger compatibility: 58.8V 2A, 58.8V 3A Charger is NOT included UL2271 compliant Fits: all A-Series models - MZFT, MZFT SE, M1D, M1D SE, B1G, B1G SE Important: never run two different batteries together. In a dual setup both packs must be the same model and specification - two 3P batteries. Mixing a 3P with a 2P, or with any other pack, can damage the batteries and voids warranty coverage. S1 BATTERY The S1 Battery 48V / 14.5Ah has the extra kick you need to go the distance on your SUPER73-S1. Removable for charging convenience and compatible with the standard SUPER73 charger. Compatible with the SUPER73-S1 only. Unlike the A-Series 3P, the S1 is not intended for dual-battery use - SUPER73 recommends running one S1 pack at a time, and does not sell or endorse a "Y" adapter for pairing them. Running two can damage the battery and is not covered under warranty. S1 specifications Voltage: 48V Capacity: 14.5Ah Watt Hours: 700Wh Weight: 8.2 lbs Dimensions: L 14in. x; W 4.5in. x; H 3.5in. 3-Pin charger compatibility: 2amp, 3amp, 5amp 2 keys included Charger and battery mount are NOT included SUPER73 decals included PLEASE NOTE Range estimates vary with rider weight, speed, temperature, wind, tire pressure, terrain, and incline Shipping rates may be higher than typical due to battery weight Shipping not available to IL or VT All battery purchases are FINAL sale