Type: Li-ion. Capacity: 3250mAh, increased 25% capacity than the original. ISO9001, RoHS and CE Certificated. Designed for: Big Jambox speaker J2011-03-US. Safety: Built in high-precision voltage detection circuit and delay circuit, make sure the battery run stable and perfectly. You Can Get: 1 pc Rapthor replacement battery( speaker not included) and free screwdriver too 100% Customer Satisfaction Guarantee: 30-day Money Back, 12-month Warranty for this Rapthor battery.