This is the Onyx NiMH 6V 2000mAh Flat Receiver Battery Pack with Universal Connector. Designed for .50-.90 size helicopters and other large scale aircraft 2-year limited warranty-Onyx brand batteries are warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase. During the first twelve months, ONYX will, at our discretion, repair or replace without service charge any product deemed inoperable due to those causes. After the first full year of warranty coverage ONYX will provide extended warranty coverage for another 12 months covering only defects in materials and workmanship. Extended coverage is limited and does not cover problems caused by abuse, misuse, and improper maintenance, failure to follow instructions, ordinary wear, or use past the battery's maximum rated number of cycles. Onyx NiMH 6V 2000mAh Flat Receiver Battery Pack w/Universal Connector Compatible Battery Charger such as the Hobbico Accu Cycle Elite, Hobbico 12V DC Quick Field Charger MkII, or the Great Planes ElectriFly Triton EQ Capacity: 2000mAh Number of Cells in Series: 5 Rated Voltage: 6V Min. Discharge Voltage: 4.5V Maximum Recommended Charge Current: 2.0A Discharge Lead Size: 22AWG Pack 2.02 x 2.8 x 0.59" (51.5 x 72 x 15mm) Weight: 4.93oz (140g) Number of Welds Per Connection: Cell Size: AA jxs 05/08/18 ir/jxs &