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Modem 18650 4-cell Battery 4400mAh Pack

Modem 18650 4-cell Battery 4400mAh Pack

Regular price $0.75 USD
Regular price $1.50 USD Sale price $0.75 USD
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Please read the description carefully.

Shipping to Lower 48 USA states only via UPS Ground. No international shipping including HI, GU, PR. Non-USA customers click here.


These are Arris BPB044S 8.4vdc 4400mAh Modem Battery Packs.  They typically contain 4 of the following 2200mAh cells:





Modem packs are great for harvesting 18650 cells as they typically have low cycles. To harvest the cells you have to crack packs open and extract the cells, you'll have to cut and clean the nickel interconnects using snips

*Note: To buy the pallets, email us so we can provide you an accurate shipping quote.

Once the cells are out and clean you will have to test them using a charger like this.

PACK Specs:

  • Typical Capacity: 4400mAh
  • Nominal Capcity: 4300mAh
  • 8v
  • 33Wh

CELL Specs:

  • Diameter: 18mm
  • Length: 65mm
  • Voltage nominal: 3.6V
  • Charge voltage cut-off: 4.2V
  • Discharging cut-off: 2.5V

The packs have 2200mAh cells in 2s2p config, making a 4400mAh pack.


How to harvest the cells Video:

*Note: Packs from this lot may not be new.

Note that these are reclaimed packs, so the actual cell voltage you receive may be lower than the label shows. We make no guarantees that all cells will be usable. These items are sold for DIY and Second Life purposes. Sold as-is. No refunds. Buyer is responsible for proper cell recycling/disposal.

Listings that are “untested” as sold as-is and cannot be returned, exchanged or refunded. 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. Buyer is responsible for proper cell recycling/disposal.

If you buy a product from us and then realize you don't have, or don't want to acquire, the tool(s) or information needed to make our product(s) work for your specific build, this does not constitute valid grounds for replacements, exchanges or refunds. You are responsible for doing your due diligence before making any purchases.

NEW YORK residents:
On 3/2/2023 New York passed a law banning the sale of lithium-ion batteries for mobility devices that are not certified to UL 2271, and the assembly and reconditioning with cells removed from used batteries for commercial sale within the state of New York (more details here). New York residents, you are solely responsible for researching, understanding and complying with all pertinent regulatory rules, laws, statutes, and NY safety standards.

Safety is important to us, we don't want people to get hurt or property to get damaged, especially when working with DIY and/or second-life lithium-ion batteries. All batteries everywhere are inherently dangerous, so we urge all who work with DIY and/or second-life lithium-ion batteries to take safety seriously so as to avoid causing any harm to self, others or property.

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