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These are Arris BPB022S 8.4VDC 2400mAh Modem Battery Packs. Great for harvesting 18650 cells as they typically have very low cycles. They typically contain x2 SONY US18650GR cells.
To harvest the cells you have to crack the packs open and extract the cells, cut and clean the nickel interconnects using snips. Once the cells are out and clean you will need to test them using a charger like this.
Typical Capacity: 2400mAh
Nominal Capcity: 2300mAh
Voltage nominal: 3.6V
Charge voltage cut-off: 4.2V
Discharging cut-off: 2.5V
How to harvest modem packs:
*Note: The video below demonstrates how to harvest cells from new modem packs, but keep in mind that the packs from this lot may not be new, or may be another amperage.
These items are sold for DIY and Second Life purposes. Even when sold as “new”, “NOS”, or “like-new”, they may be in less than perfect condition.