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Rectangular nickel-zinc battery pack, matte finish, 69.30 by 67.60 by 19.00 mm

Cameron Sino PA20 Battery OM11596 3800mAh 4.8V

SKU CH-VM7N-WWV0C

A 4.8 V, 3800 mAh nickel-zinc pack replaces the Bullard PA20 air purifier battery OM11596 or PA1RBAT

  • Battery pack size69.3 × 67.6 × 19
  • Battery typeNickel zinc
  • Battery capacity3,800 mAh
  • Battery voltage rating4.8 V
  • Details69.3 × 67.6 × 19
  • Product typeNickel zinc
  • Replacement for Bullard PA20 air purifying system
  • 3800 mAh nickel-zinc chemistry delivers 18.24 Wh
  • 8 V output matches original specifications
  • Compact 69.30 × 67.60 × 19.00 mm form factor
  • Built-in protection against overcharge, over-discharge and short circuits

Replacement Battery for Bullard PA20

This nickel-zinc battery replaces the Bullard OM11596 and PA1RBAT cells used in the PA20 air purifying respirator. It delivers 3800mAh at 4.8V for 18.24Wh of capacity. The pack measures 69.30 x 67.60 x 19.00 mm and weighs 204.0g. A decoded chip ensures communication with the original device electronics.

Sustained Runtime in Medical Use

The 3800mAh rating supports extended shifts without a mid-day recharge. Nickel-zinc chemistry maintains a stable voltage plateau through most of the discharge cycle, so airflow remains consistent until the pack is nearly empty. Full performance is reached after two or three complete charge and discharge cycles.

Thermal Behaviour and Safety

The battery carries ISO9001, RoHS and CE certification and includes overcharge, over-discharge, over-voltage and short-circuit protection. Do not store the pack above 60 °C or 140 °F. Avoid disassembly, fire or water exposure to prevent hazardous failure.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $23.99
Pricier than about 81% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameCameron Sino
Model namePA20 Air Purifying System, PA20 RSPIRATOR
Part number84932, OM11596, PA1RBAT
Product typeNickel zinc
Power
Battery typeNickel zinc
Battery capacity3,800 mAh
Battery voltage rating4.8 V
In the box
Battery pack size69.3 × 67.6 × 19

Questions about this item

Does the nickel-zinc chemistry run hot during a full shift?

Nickel-zinc cells operate at 4.8 V and 3800 mAh without the thermal issues seen in lithium packs, so the unit stays cool during extended use.

What existing charger and device do I need for this pack?

You must already own a Bullard PA20 Air Purifying System and its original charger; the pack uses the same connector as the OEM OM11596 cell.

Will the 69.30 x 67.60 x 19.00 mm size fit my older PA20 housing?

Yes, the dimensions match the original battery exactly, so it slides into any PA20 housing that took the factory pack.

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