Ofeely 3.7V 4500mAh 3490120 Lithium Li-Po Polymer Accumulator Rechargeable Battery for Mobile Power Bank PC DIY Go to amazon.com Related posts Top 10 best 3.7 4500 for 2022 FeatureBuilt-in protection circuit PCM for prevent over charging or over dischargingSize: 3.4mm(H)*90mm(W)*120mm(L)Rating: DC3.7V 4500mAh DescriptionPackage include:1pcs 3.7V 4500mAh 3490120 Lithium battery.