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24V Super High Capacity (418 Wh) Rechargeable Battery Compatible with ResMed AirSense 10 CPAP Machine
24V  Super High Capacity (418 Wh) Rechargeable Battery Compatible with ResMed AirSense 10 CPAP Machine

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Regular Price: US$799.00
Sale Price: US$449.95
Condition: Brand New
Warranty: 1 Year Warranty

Stock Status:In Stock

Product Code: BX3691-DC24VS10

This power pack comes with a super high capacity light weight rechargeable lithium ion battery ( 36V 11.6Ah or 418Wh) and a BiXPower 24V DC converter specially designed for a ResMed AirSense 10 CPAP machine. It may power ResMed AirSense 10 CPAP machines for 4 ~ 5 nights with the humidifier turned off.

This battery
works with the following AirStart™ 10, AirSense™ 10, and AirCurve™ 10 machines manufactured by ResMed:
• AirStart™ 10 CPAP with HumidAir™ Heated Humidifier
• AirStart™ 10 Auto CPAP with HumidAir™ Heated Humidifier
• AirSense™ 10 CPAP Machine with HumidAir™ Heated Humidifier
• AirSense™ 10 Elite CPAP Machine with HumidAir™ Heated Humidifier
• AirSense™ 10 AutoSet CPAP Machine with HumidAir™ Heated Humidifier
• AirSense™ 10 AutoSet for Her CPAP Machine with HumidAir™ Heated Humidifier
• AirCurve™ 10 S BiLevel Machine with HumidAir™ Heated Humidifier
• AirCurve™ 10 VAuto BiLevel Machine with HumidAir™ Heated Humidifier

Battery Features:

Small Size and Light Weight:

This battery weighs only around 5 pounds.
Using a Lithium-ion battery offers many advantages over older SLA (Sealed Lead Acid) batteries because of Lithium-ion's high energy density, small size, and low weight. A typical Lithium-ion battery may only be 1/5 of the weight and 1/2 of the size compared to a same capacity traditional heavy bulky Sealed Lead Acid batter.

Lithium-ion Battery vs. Lead Acid Battery Comparisons

Battery Type

Lithium ion Battery

Lead Acid Battery

Voltage fluctuation in working

Remains stable with different output

Voltage fluctuation based on output

Cycle Life
(Residual capacity over 5%)

500 ~700 times

150~300 times


Very stable and very little affection by output current

Suffer a big affection in by output current. Capacity will be much smaller than rated capacity when output current is large.

Depth Of Discharge (D.O.D.)


50% ~ 60%

Self discharge rate (per month)

1~1.5% (Capacity remains over 80% even the battery is idled for one year)

30% (Battery capacity drops near to zero if it is unused for 3 months)

Fast charge capability

Charge to full capacity in about 6 hours

It needs 8 ~ 12 hours to fully charge the battery

Discharge working temperature ℃



Memory effective



Thermal stability



Weight (Compare to the same capacity)

1/4 of weight to lead acid battery

comparatively heavier weight


Any direction

Upright position is necessary


Built-in safety protection function

Danger of acid leakage

Environmental conform-ability

Conforms to RoHs standard

Violates RoHs standard;Lead and sulphate acid are pollutants

Disposition of used battery

Lithium-ion batteries are generally not considered an environmental hazard because they do not contain lithium metal. The United States government labels them as non-hazardous waste and does not oppose them being discarded together with the trash that makes up the local waste stream.

Needs special recycling after treatment utility

LED Display:

The Four-level LED indicates current power status.

AC Charger:

This battery comes with its own AC charger that can charge the battery from any 110V ~ 240V AC power source.

Safety Features:
  • Water-resistant and firm ABS plastic casing.
  • Built-in PCB protection.
  • Prevent short circuit, over-current, over-heat, over-charge, over-discharge.
  • The internal pack is stabilized by braces, thereby avoiding mechanical accidents caused by vibration.

Model No.
  • BX3691B
Cell Brand
  • Panasonic

  • Lithium-ion
  • Nominal Voltage: 37 V
  • Minimum Voltage: 30V
  • Maximum Voltage: 42.5V
  • 11.6Ah @ 36V
  • 418 Watt-hour
  • 10S4P
Inner Resistance
  • ≤75 mΩ
Charge Voltage Limit
  • 42.5V
Max. Charge Current
  • 2 A
Continuous Discharge Current
  • 13 A
Burst Discharge Current
(up to 10 minutes)
  • 15 A
  • 7.5" x 5" X 3.8" ( or 180 x 123 x 92mm)
  • 2.33 kg (or 5.1pounds)
Operate Temp. Charge
  • 0~45 ℃
Operate Temp. Discharge
  • -20~60 ℃
Storage Temp.
  • -20~40 ℃
Cycle Life
  • 500 times
PCB Safety Function
  • Cell balancing
  • Over-discharge
  • Over-current protection
  • Over-charge
  • Temperature protection
  • Secondary protection

24V DC to DC Converter Features:

This DC to DC power adapter can convert 36V /48V battery output voltage to 24V DC power. Maximum output 6A (144W). Its input voltage range is between 32V to 55V. Its output voltage is 24V, maximum output current is 6A (144W)

This DC converter start up voltage is 32V. Its cut off voltage is 29V. This means the converter will start to work when input voltage is 32V or higher. After it starts working, it will keep working until input voltage drop to 29V.

A typical 36V lithium ion battery ( 10 cells in serial) output voltage range is 30V to 42V. A typical 48V lithium ion battery ( 13 cells in serial) output voltage range is 39V to 54.6V. So this converter works for both 36V and 48V lithium ion batteries.

Wide input range: 30V ~ 55V
Start up voltage: 32V
Input Connector: Anderson Power Pole
Input Wires: 16AWG, Length: 300mm
Output Voltage: 24V, Maximum 6A ( 144W)
Output Wires: 16AWG, length: 900mm
High efficiency ( > 90%)
Small size: 2.98” x 2.98” x 1.3” (74 x 74 x 32.5 mm)
Light weight:
10.2 oz (289g )

The red color is for Positive input and the black color is for Negative/Ground input. It is CRITICAL that the power adapter is connected correctly in polarity to the power source: Positive on adapter connects to Positive on power source. Negative on adapter connects to Negative on power source. FAILURE TO DO SO MAY RESULT IN SEVERE DAMAGES.

Safety Protections:

Compare to similar DC converters on market, BiXPower has added many extra safety protection functions on this converter, such as

1. Output over current protection
2. Output over voltage protection
3. Output over load protection, Auto-recovery when device is back to normal operating,
4. Over-temperature.(V) --- Chip IC has the over heating protection function.
5. Output Short Circuit protection
Technical Specifications:

  • Acceptable Input DC Voltage Range : 30V ~ 55V
  • Start up voltage: 32V
  • Output power(max) 144W
  • Output voltage: 24V
  • Output current: Max. 6A*
  • Efficiency: > 90%
  • Input wires: 16AWG, length: 300mm
  • Output wires: 16AWG, length: 900mm
  • Weight 10.2 oz (289g )
  • Dimension 2.98” x 2.98” x 1.3” (74 x 74 x 32.5 mm)

*6A is its maximum output current, not actual output current. Actual output current depends on the device's requirements. For example, if your device requires 2 Amps, it will output 2 Amps.

Package contents:
1. One BX3691 battery: 36V 11.6Ah, or 418 Watt-hour.
2. One Battery AC Charger and power cord
3. One 36V to 24V DC Converter, maximum output 6A.

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