I have a Philips HeartStart FRx at my office — what replacement battery do I need and how much is it?
You need the Philips M5070A battery (also labeled M5066A, M5067A, M5068A, 861304). It fits all three models: HeartStart FRx, HeartStart Home, and HeartStart OnSite.
Our latest 2026-batch M5070A is $119.00 with free US shipping — a sealed, 4-year-life battery marked "Replace by 2030." OEM Philips pricing typically runs $195–$280 from authorized distributors.
Not interchangeable with the M3863A (older FR2/FR2+) or M3539A (MRx professional defibrillator). Always verify your AED model before ordering.
Can I use an aftermarket battery in my HeartStart OnSite, or must I buy the official Philips OEM?
A quality genuine-spec compatible replacement works safely — as long as it matches the 9V, 4200mAh spec and includes full PCM protection (overcharge, over-discharge, short-circuit, and temperature cutoff).
Our M5070A replacement passes UN38.3 transport testing and communicates correctly with the AED's self-test circuit. The device's "ready" indicator and periodic self-checks function exactly the same as with the OEM battery.
Under the Magnuson-Moss Warranty Act, using a third-party battery does not automatically void your AED warranty. At $119.00 vs $195–$280 OEM, the savings add up — especially for clinics, gyms, churches, and schools maintaining multiple AEDs.
My HeartStart MRx shows "Battery Low" after charging — is the M3539A the right replacement?
Yes — the Philips M3539A (90Wh, 18V) is the correct battery for the HeartStart MRx monitor/defibrillator. If it won't hold a charge after a full overnight cycle, the battery has reached end of life.
Our replacement is $419.99 with a 12-month warranty. After installing, run the MRx's battery calibration test from the service menu and log the replacement in your biomed maintenance record.
Are the Philips HeartStart XL+ battery and FRx battery the same? Can they be swapped?
No — they are completely different and NOT interchangeable.
- FRx/Home/OnSite → M5070A (9V, non-rechargeable, 4-year shelf life, $119.00)
- XL+ → REF 989803167281 (rechargeable lithium-ion, higher voltage, $369.99)
The XL+ is a hospital-grade monitor/defibrillator with manual override, pacing, and SpO₂ — it draws far more power and uses a physically larger rechargeable pack.
Can I use a BA-500 (Inogen G5) battery in my Inogen G3? I found one cheap and want to know if it fits.
No — do not attempt this. The G3 and G5 use physically different batteries with different connectors, voltages, and communication protocols. A BA-500 will not physically fit in a G3, and forcing it could damage your device's power board.
Each generation requires its own battery:
- G3 / OxyGo → BA-300 (92Wh, $119.99) or BA-316 dual pack ($245.99)
- G4 / OxyGo FIT → BA-400 (14.54V, 3.5Ah, $289.99)
- G5 / Rove 6 → BA-500 ($299.99), BA-600, or BA-601 ($569.99)
My Inogen G5 battery only lasts ~2 hours on setting 3 — should I buy the BA-500, BA-600, or BA-601?
A healthy BA-500 should deliver roughly 3.5 hours on setting 3. Two hours means your battery is aging and it's time to replace. Here's how to decide:
- BA-500 ($299.99) — best if you mostly use the G5 near an outlet and just need battery for short errands.
- BA-601 (96Wh extended) ($569.99) — best for travel or all-day outings. Expect 6–7 hours on setting 3, roughly double the standard battery.
On high flow settings (5–6), go straight for the BA-601 — the standard battery drains very quickly at maximum pulse dose.
Is it worth buying a spare battery for my Inogen G5 for a cross-country flight — and can I carry both on the plane?
Yes — a spare battery is strongly recommended for air travel. Airlines require enough battery power for 150% of total trip duration (flight + pre-boarding + layover + deplaning + delays). One BA-500 won't cover a transcontinental flight at higher settings.
FAA / TSA Rules:
- BA-500 and BA-601 are both under 100 watt-hours → allowed in carry-on (not checked baggage).
- No hard limit on sub-100Wh medical batteries — TSA considers two spares reasonable.
- Tape over the terminals or use original packaging. Notify the TSA officer at screening.
Recommended combo: BA-601 (96Wh, $569.99) as primary + BA-500 ($299.99) as backup → roughly 10+ hours total on setting 2.
My Inogen G3 BA-300 won't charge past 75% anymore — fixable, or time for a new battery?
This is not fixable. When a lithium battery won't charge past a certain percentage, one or more internal cells have degraded to the point where the protection circuit (PCM) cuts off early. The sealed pack can't be serviced.
A new BA-300 costs just $119.99 and restores full runtime (~4–5 hours on setting 2 with the 92Wh pack). For extended runtime, the BA-316 dual pack ($245.99) gives you two batteries the G3 automatically switches between.
What replacement battery fits the Philips SimplyGo Mini — I see two part numbers: 1116817 and 1080642?
Both REF 1116817 and REF 1080642 are valid for the Philips SimplyGo Mini — functionally identical, different manufacturing batches.
- REF 1116817 — $189.99 (best value)
- REF 1080642 — $339.99 (OEM-spec, higher capacity variant)
- REF 1082662 (4ICR19/65-3) for Simply Go — $309.99
The SimplyGo Mini on continuous flow is power-hungry — a single battery lasts only ~45–60 minutes at 1 LPM continuous. Carry at least two spares if you rely on continuous flow mode.
Our hospital's Philips MP60 monitors die during patient transport — what's the right replacement battery?
The Philips M4605A (10.8V, 65Wh) fits the entire MP series: MP20 through MP90, M8001A, M8002A, M8100, MX500, MX450. At $99.99 each, it costs a fraction of what Philips charges through hospital supply contracts.
- Supports hot-swap — swap batteries during transport without powering down the monitor.
- New batteries need 2–3 full charge cycles before the fuel gauge reads accurately — do this before putting them into clinical rotation.
- Bulk pricing available — email battery@accessories-mall.com for hospital volume quotes.
- Replace monitor batteries every 2 years in high-utilization hospital environments.
Which battery fits the GE B450 patient monitor — FLEX-3S2P or FLEX-3S3P?
They are different and not interchangeable:
- FLEX-3S2P (REF 2062895-001) → GE B450, B105, B125, B135 — $419.99
- FLEX-3S3P (REF 2036984-001) → GE B650, B105, B125 — $319.99
The 3S3P has more cells (3-series-3-parallel vs 3-series-2-parallel) and higher capacity. Check your existing battery's REF number or your monitor's service manual before ordering.
Do you sell batteries for Nihon Kohden bedside monitors — SB-950P or SB-671P?
Both are available:
- SB-950P → Lifescope G5, G7, CSM-1501, BSM-1700 — $349.99
- SB-671P → Lifescope TR, X705, 02221 — $489.99
These are completely different form factors for different Nihon Kohden monitor generations. Nihon Kohden is widely used in US hospital ICU and telemetry units — OEM batteries from the manufacturer are extremely expensive. Check your existing battery's part number before ordering.
