Used Inogen One G5 Replacement Battery (8 Cell and 16 Cell)

Affordable portable power for your oxygen concentrator

Used battery. 

If you use an Inogen One G5 portable oxygen concentrator, having a dependable battery is essential for staying mobile and confident throughout the day. This listing is for a used Inogen One G5 battery in either 8 cell or 16 cell options, giving you a more affordable way to add backup power for errands, appointments, and travel days.

Because this is a pre-owned battery, runtime will vary based on battery age, prior usage, and your device setting. If you want the most predictable runtime, you may prefer a new battery, but many customers choose used batteries as a budget-friendly backup.

Why choose a used G5 battery

More affordable backup power
Used batteries are a practical option if you want portable power at a lower cost than new.

Great for a second battery setup
Perfect as a spare battery for longer outings, emergencies, or travel planning.

Easy to swap and recharge
Designed to install and remove quickly so you can keep your oxygen therapy routine moving.

Works with your daily routine
Helpful when you are away from outlets, riding in a car, or spending long hours outside the home.

Choose the right option

Used 8 Cell Battery

Best for everyday portability
A lighter battery option that works well for short outings and as a backup.

Typical maximums when new (your used runtime may be lower)
• Up to 6.5 hours runtime
• Up to 3 hours charging time

Used 16 Cell Battery

Best for extended time away from home
A larger capacity option for long appointments, travel days, and fewer charging breaks.

Typical maximums when new (your used runtime may be lower)
• Up to 13 hours runtime
• Up to 6 hours charging time

Battery performance depends on your flow setting, breathing pattern, temperature, and battery condition.

Condition expectations for used batteries

Used batteries may have:
• reduced runtime compared to new batteries
• cosmetic wear from normal handling
• a different number of prior charge cycles

If you want, we can help you choose between used and new based on how long you need to be away from a charger.

Key features

• Two capacity choices: used 8 cell or used 16 cell
• Rechargeable lithium-ion power designed for daily use
• Quick swap design for easy replacement
• Flexible charging through AC or DC power when installed in a compatible unit and connected properly
• Affordable way to build a backup battery setup

Compatibility notes

These batteries are designed for the Inogen One G5 platform and are also compatible with the Inogen Rove 6.
Many customers also use this same battery platform with the OxyGo Next.
Not compatible with the Inogen One G3 or Inogen One G4, which use different battery types.

Who this used battery is best for

• Inogen One G5 users who want a more affordable spare battery
• Travelers planning longer days away from charging outlets
• Caregivers building a more reliable daily oxygen routine
• Anyone looking for a budget-friendly Inogen G5 replacement battery

Need help choosing

Not sure whether the used 8 cell or used 16 cell is best for your routine? Open a chat and tell us your typical G5 setting and how long you are away from home on a normal day, and we will help you choose the right option.