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, 3.7V is stepped down to 2V through the chip, so at least 750 mAh of capacity can be obtained 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