USBC rechargeable Battery PB-3 PB-4 PB-4S For AIWA HS-JX HS-PX HS-RL HS-JL HS-RX $29.99 per piece ?In bulk, Cassette recorder not included. Just the battery? This is a rechargeable Lithium polymer battery with a built-in USB charging port. We will provide a USBC charging cable. Compared with the original Lead-Acid Battery , you can understand that the original battery is 2V * 470mAh, Our battery is 3.7V *500mAh, At least you can get 750 mAh of power. There may be some loss in actual use, but the actual capacity of lithium batteries is much greater than that of Lead-Acid Batterys. The characteristics of lithium batteries are stable voltage and will not suddenly shut down when the battery is low. With charging indicator light So lithium batteries are a better choice. $29.99 per piece 3D printing requires production queuing time, usually we ship items in about a week Dear customer, I'm sorry, because 3D printing is not as perfect as traditional plastic products. If you receive the items and have any questions, please leave a message to me. Please don't worry, the items are guaranteed, thank you 3D printing material can withstand high temperatures up to 65?, 149? please pay attention to the temperature