CYLINDRICAL CELL · 3.65V 3500MAH LI-ION
EVE 18650 35V 3.65V 3500mAh Cylindrical Cell
Nominal voltage 3.65 V · Nominal capacity 3500 mAh · Cylindrical 18 × 65 mm format · High-energy density 18650 cell.
View SpecificationsINDUSTRY / MEDICAL DEVICES / PORTABLE RESPIRATORY & LIFE-SUPPORT
Oxygen Concentrators, Ventilators & CPAP Backup: Compatible Voltage Platforms & Custom Options
Portable oxygen concentrators (POCs), ambulance transport ventilators, and home CPAP backup units require high-energy cylindrical cells to drive miniature PSA air compressors while keeping shoulder-bag carry weight under 2.5 kg. Review EVE 18650 33V/35V and 21700 50E/58E cells and custom 3S/4S pack options.
- Application Scope
- Portable oxygen concentrators (POC), transport ventilators, CPAP backup
- Voltage Platform
- 10.8 V (3S) and 14.4 V (4S) SMBus v1.1 smart battery packs
- Cell Options
- EVE 18650 35V (3500mAh) & EVE 21700 50E (5000mAh)
COMPATIBLE BARE CELLS · PORTABLE RESPIRATORY & LIFE-SUPPORT
Compatible Voltage Platforms & Custom Options
CYLINDRICAL CELL · 3.65V 5000MAH LI-ION
EVE 21700 50E 3.65V 5000mAh Cylindrical Cell
Nominal voltage 3.65 V · Nominal capacity 5000 mAh · Cylindrical 21 × 70 mm format · Energy-series 21700 cell.
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CYLINDRICAL CELL · 3.6V 5700MAH LI-ION
EVE 21700 58E 3.6V 5700mAh Cylindrical Cell
Nominal voltage 3.6 V · Nominal capacity 5700 mAh · Cylindrical 21 × 70 mm format · Ultra-high-capacity 21700 cell.
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CYLINDRICAL CELL · 3.6V 3200MAH LI-ION
EVE 18650 33V 3.6V 3200mAh Cylindrical Cell
Nominal voltage 3.6 V · Nominal capacity 3200 mAh · Cylindrical 18 × 65 mm format · High-capacity lithium-ion cell.
View SpecificationsCUSTOM BATTERY PACK ENGINEERING (PORTABLE RESPIRATORY & LIFE-SUPPORT)
Need a Custom 10.8 V (3S) and 14.4 V (4S) SMBus v1.1 smart battery packs Pack for Oxygen Concentrators, Ventilators & CPAP Backup?
AntBattery currently supplies matched bare cells (EVE 18650 35V (3500mAh) & EVE 21700 50E (5000mAh)) and assembles custom 10.8 V (3S) and 14.4 V (4S) SMBus v1.1 smart battery packs series-parallel battery packs for Portable oxygen concentrators (POC), transport ventilators, CPAP backup with tailored L × W × H enclosures, BMS current ratings, and wire harnesses.
ENGINEERING VERIFICATION
Oxygen Concentrators, Ventilators & CPAP Backup Operating Conditions and Cell / Pack Sizing
Submit Compartment & Load SpecsParent & sibling categories in Medical Devices: Patient Monitors, Infusion Pumps & Diagnostic Devices, Medical Carts, Hospital Beds & Electric Wheelchairs. Related voltage catalog: 10.8V & 14.4V Cylindrical Platforms.
PSA Molecular-Sieve Compressor Pulse Current (4S 14.4V / 3S 10.8V)
Portable oxygen concentrators cycle miniature swing-piston compressors every few seconds, drawing 4 A–8 A rhythmic current pulses on a 4S (14.4V) or 3S (10.8V) bus.
8-Cell (4S2P) vs 16-Cell (4S4P) Slide-On Patient Double-Battery Packs
POC manufacturers offer standard (4S2P) and extended double-duration (4S4P) slide-on battery cartridges using 3500mAh 18650 or 5000–5700mAh 21700 cells.
Watt-Hour (Wh) Sizing Under 100 Wh / 160 Wh Passenger Cabin Thresholds
To allow respiratory patients to carry spare batteries on commercial flights, 4S2P 18650 (3500mAh = 100.8 Wh nominal / <100 Wh rated) and 4S1P/4S2P 21700 packs are sized around aviation carry-on Wh limits.
Precision Remaining-Minute Fuel Gauge Telemetry
Respiratory equipment displays remaining runtime in exact minutes; custom packs integrate impedance-tracking fuel gauge ICs with redundant secondary over-voltage protection.
TECHNICAL REFERENCE
Oxygen Concentrators, Ventilators & CPAP Backup Battery Engineering FAQs
Why are 4S2P 18650 (3500mAh) and 4S1P/4S2P 21700 (5000–5700mAh) the standard for portable oxygen concentrators?
A 14.4V (4S) bus efficiently drives brushless 12V–15V PSA air compressors, while 3500mAh 18650 and 5000–5700mAh 21700 cells maximize oxygen flow setting runtime per gram.
How is a POC battery pack kept below the 100 Wh airline carry-on threshold?
A 4S2P pack using 3.6V 3350mAh–3450mAh 18650 cells or a 4S1P pack using 21700 58E (5700mAh = 82.0 Wh) stays cleanly under the 100 Wh cabin baggage limit while delivering 2.5 to 5 hours of pulse-flow oxygen.
What redundancy features are built into custom respiratory battery packs?
Custom medical packs incorporate primary fuel-gauge BMS control plus an independent secondary over-voltage/over-temperature thermal fuse IC and gold-plated blade connectors.
Can we source matched bare EVE 18650 35V or 21700 50E/58E cells for medical pack assembly?
Yes. We supply tightly graded bare cylindrical cells as well as custom-tooled 3S/4S battery cartridges via Custom Battery Packs.
CUSTOM ENGINEERING & QUOTATION
Oxygen Concentrators, Ventilators & CPAP Backup Battery Engineering Inquiry
Provide your respiratory device or CPAP backup voltage (10.8V 3S or 14.4V 4S), target Wh limit (<100Wh or <160Wh), compressor current draw, and cartridge dimensions.
Discuss on WhatsApp info@antbattery.comRELATED INDUSTRY CATEGORIES
All Industries ↗ Medical Devices ↗ 10.8V & 14.4V Cylindrical Platforms ↗ Custom OEM Battery Packs ↗