I bit the dust and disassembled one of my 3 battery packs (have a 4th on order JIC). Below are pictures of the inside of the battery for those that were interested. I did some research on the DLX-6118 board and found this website in China - 4串锂电池保护板 适用于高倍率锂电可充电电池 平衡二次充电保护 which describes the board as follows: Name: DLX-6118-L4S5A balance charging rechargeable lithium battery protection board protection Test voltage: 12V Overcurrent current: 5A Size: PCM Size ≦ 37.5 * 32.5 * 7mm Applications: high-rate lithium rechargeable battery Note: This section is used to balance the charge rechargeable protection (no discharge, over-current, short circuit protection) Features: ◆ high-quality IC and a new sheet. ◆ with a load capacity, high voltage, low on-resistance power MOSFET, having a typical voltage detection side ◆ Formula overcharge protection, over-discharge protection.Hardware overcurrent, ◆ Short circuit protection, short circuit protection and reliable performance, long load circuit will not yield to the protection board batteries and students affected. ◆ charge-discharge process corresponding temperature protection. ◆ low power consumption, the whole current consumption less than 50uA. Next step is to see if there is additional information to be gathered about the cells themselves, measure the IR of each cell. and post a picture of the connector labeling the various connectors.