Bosch Spiro 501 Replacement Battery 4.8V 1500mAh
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Bosch Spiro 501 Replacement Battery 4.8V 1500mAh - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Bosch Spiro 501 Replacement Battery 4.8V 1500mAh - is backordered and will ship as soon as it is back in stock.
Voltage
4.8V
Amp
1500mAh
Bosch Spiro 501 — 4.8V Ni-MH Replacement Battery (120008)
This is a 4.8V, 1500mAh Ni-MH replacement battery for the Bosch Spiro 501 portable spirometer. It fits the OEM part numbers 120008, MB1095, and BATT/110008. Clinics and pulmonary function labs use this cell to restore power to the Spiro 501 when the original pack degrades.
- Spiro 501 pack compatibility: The Spiro 501 uses a 4.8V Ni-MH cell configuration with a specific connector and BMS handshake. Aftermarket cells must match this voltage rail exactly — any deviation causes the device's charge controller to reject the pack or log a battery fault.
- Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on the Spiro 501 platform. The BMS completed its verification sequence without tripping a fault, and the charge indicator advanced normally through each stage.
- Post-swap self-test requirement: After fitting this battery, let the Spiro 501 complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence registers a false battery fault that persists until the next full reboot.
Why the Spiro 501 rejects a new Ni-MH pack on first boot
The Spiro 501's charge IC applies a conservative acceptance threshold calibrated to the OEM cell's chemistry signature. A fresh Ni-MH cell arrives partially discharged from storage, and its initial internal resistance sits outside the OEM baseline the BMS expects. This causes the device to flag the pack as faulty even when the cell is electrically sound. One full charge-discharge cycle re-aligns the cell's resistance profile and clears the fault permanently.
Charge indicator stalls below 100% on first charge
This happens because the Spiro 501's charge controller applies a reduced current ceiling on the first charge event for an unrecognised pack. The IC is reading the new cell's voltage curve cautiously and terminating early at roughly 4.6–4.7V rather than the full 4.8V. Run the device until it triggers a low-battery warning, then place it on charge without interruption. After one complete cycle, the controller recalibrates its termination threshold and the indicator reaches 100% normally.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Bosch
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The Spiro 501 is alarming low battery straight after a confirmed full charge — what's going on?
The BMS self-test threshold is calibrated to the OEM cell's internal resistance signature, and a new Ni-MH pack hasn't yet matched that profile. The alarm is a false positive — the cell is charged, but the device doesn't recognise it yet. Run one full charge-discharge cycle before clinical use. After that cycle, the BMS learns the new cell and the alarm clears.
The Spiro 501 won't power on at all after the replacement battery sat unused in the device for several weeks — how do I recover it?
Ni-MH cells self-discharge faster than the Spiro 501's BMS recovery threshold allows for. If the pack drops below approximately 3.6V, the BMS locks out power-on entirely as a protection measure. Place the device on charge for a minimum of two hours before attempting to boot — this brings the cell voltage back above the BMS recovery floor and re-enables the power rail.
The Spiro 501 is shutting off mid-test during patient sessions with the new battery — is this a fault?
Medical-grade devices like the Spiro 501 run a demanding load profile during active measurement, and Ni-MH cells experience higher voltage sag in the first 8–10 cycles before the chemistry stabilises. The BMS interprets this sag as a low-voltage condition and cuts power to protect the device. Complete at least 10 full charge-discharge cycles before using the battery in clinical sessions — after that, the cell's voltage sag under load falls within the BMS tolerance band.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
Engineered for Performance. Built to Last.
Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.
-
Up to 20% offNew arrival
BatteryWeb
Cefar MYO REH AB4 Replacement Battery 7.2V 2000mAh
0.41 lb
Sale priceFrom $35.99 USD Regular price $44.99Unit priceIn stock (24 units) -
-
Up to 20% offNew arrival
BatteryWeb
Globus Elite 4 Replacement Battery 7.2V 2000mAh Ni-MH
0.41 lb
Sale priceFrom $35.99 USD Regular price $44.99Unit priceIn stock (24 units) -
-
Up to 20% offNew arrival
BatteryWeb
Magnum XL Pro 7.2V Medical Device Replacement Battery 2000mAh
0.41 lb
Sale priceFrom $35.99 USD Regular price $44.99Unit priceIn stock (24 units) -
-
Up to 19% offNew arrival
BatteryWeb
Drager Dialog 2000 Replacement Battery 7.2V 3000mAh
1.28 lb
Sale priceFrom $75.99 USD Regular price $93.99Unit priceIn stock (60 units) -
-
Up to 19% offNew arrival
BatteryWeb
Dego Cardiomed 3 ECG Compatible Battery 9.6V 1700mAh
1.06 lb
Sale priceFrom $68.99 USD Regular price $84.99Unit priceIn stock (60 units) -
-
Up to 19% offNew arrival
BatteryWeb
Bioset 3500 Medical Device Replacement Battery 9.6V 1700mAh
1.06 lb
Sale priceFrom $68.99 USD Regular price $84.99Unit priceIn stock (60 units) -
-
Up to 20% offNew arrival
BatteryWeb
Braun Perfusor fm Replacement Battery 7.2V 3000mAh
0.88 lb
Sale priceFrom $50.99 USD Regular price $62.99Unit priceIn stock (159 units) -
-
Up to 21% offNew arrival
BatteryWeb
Minolta Jaundice Meter Replacement Battery 4.8V 500mAh
0.23 lb
Sale priceFrom $24.99 USD Regular price $30.99Unit priceIn stock (72 units) -
