Nitecore NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series Yellow. Compared to its predecessor the NL2150HPi the NL2155HPi features a bigger capacity and a bigger discharge current. The NL2155HPi is part of Nitecores upgraded i-Series line offering enhanced performance while remaining fully compatible with existing i-Series flashlights that use i batteries. Featuring Nitecore's hallmark safety standards and precision engineering the NL2155HPi reinforces the brand's reputation as a reliable source of rechargeable Li-ion batteries. The NL2155HPi incorporates a built-in intelligent protective circuit and a pressure relief valve safeguarding it against overcharging over-discharging and short circuits. Crafted with top-tier materials such as nickel-plated stainless steel protectors that fortify it against impacts ensure efficient conductivity and fend off oxidation the battery is further coated with a durable metallic film bolstering its resilience against abrasion. Designed for longevity it can withstand over 500 full recharge cycles making it both cost-effective and environmentally friendly. Specifications for Nitecore NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series: Manufacturer: Nitecore Color: Yellow Battery Capacity: 5500 mAh Length: 3.06 in Weight: 2.72 oz Battery Type: Lithium Ion Width: 0.86 in Height: 0.86 in Features of Nitecore NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series Features a 5500mAh capacity Continuous 20A discharge current Made for I series lights like P20iX P23i SRT7i etc. Overcharge/discharge protection circuits Package Contents: Nitecore NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series Nitecore 6952506497225: NL2155HPi 5500mAh Rechargeable 21700 Battery for i Series Yellow