Medical device battery repair
Medical device battery packs: Inogen One G3/G5 and Philips SimplyGo, NiMH-to-Li-Ion conversions.
A portable oxygen concentrator no longer delivers full runtime. A patient monitor battery drains too fast or stops charging altogether. An infusion pump battery throws an error. In cases like these the fault is usually not in the device itself but in the battery pack — the cells are worn out, the BMS board has drifted out of calibration, or the original battery is simply no longer available to buy. We rebuild medical device battery packs, replace cells and calibrate BMS boards for Inogen One G3/G4/G5, Philips SimplyGo, pulse oximeters, patient monitors, infusion pumps and defibrillator trainers (non-clinical units). Medical device batteries face higher requirements than standard consumer electronics — capacity accuracy and BMS reliability are critical. We work with custom pack configurations, perform NiMH-to-Li-Ion upgrades for older devices, calibrate BMS boards for medical-grade reliability and verify capacity with full-cycle testing. All battery work carries a 6-month warranty. Diagnostics are performed on the spot — the device must be brought in person. We do not service clinical defibrillator batteries — those must only be handled by a manufacturer-authorised service.
Popular models we repair
- Inogen One G3 / G4 / G5 oxygen concentrator batteries
- Philips SimplyGo / SimplyGo Mini batteries
- Pulse oximeter battery packs
- Patient monitor battery modules
- Infusion pump batteries
- Defibrillator trainer batteries (non-clinical)
Common problems we fix
- Capacity loss in critical devices — oxygen concentrator no longer provides full runtime
- Custom battery pack configurations — non-standard sizes and voltages, originals discontinued
- NiMH to Li-Ion upgrades — weight reduction and capacity improvement for older devices
- BMS calibration for medical-grade reliability — precise capacity and voltage monitoring
Detailed problem guides
Pick a symptom — we walk through the causes, what you can check yourself, and when to bring it in.
Medical device battery pack assembly and testing
Rebuilding medical device batteries demands higher precision than standard consumer electronics battery repair. Portable oxygen concentrators — for example, the Inogen One G3 with an 8-cell Li-ion pack or the Philips SimplyGo with a 14.4V lithium block — are devices on which a patient may be vitally dependent. Cell selection is therefore especially strict: we use only high-quality Li-ion cells from verified suppliers, and every cell is individually tested before assembly.
The assembly process includes precise cell matching by internal resistance (within ±5 mΩ) and capacity (within ±30 mAh), spot welding with pure nickel strip, BMS board connection, and full capacity verification using a calibrated electronic load. For infusion pump and patient monitor batteries we also verify the communication interface between the battery and the device — many medical instruments use the SMBus or I²C protocol to read battery status. After assembly we run three full charge-discharge cycles to verify capacity stability and BMS protection functions. All work is performed at our service centre.
Custom battery solutions for healthcare equipment
The medical device market is fragmented — dozens of manufacturers with unique battery pack configurations, many of which are no longer available for purchase. SATER offers custom battery pack fabrication that replaces original batteries with modern cells and an improved BMS. A typical example is upgrading NiMH batteries to Li-Ion technology for older medical devices. NiMH batteries, widely used in early-2000s portable medical equipment, are now outdated — their energy density is two to three times lower than Li-Ion cells, and they suffer from a pronounced memory effect.
Moving from NiMH to Li-Ion requires careful voltage and current analysis. A Li-Ion cell has a nominal voltage of 3.6–3.7V compared with 1.2V for NiMH, so the cell count and configuration differ. We design the new pack to deliver exactly the same output voltage as the original and fit a BMS board with medical-grade protection features — overheat protection, overcurrent protection, cell balancing and precise capacity monitoring. The result is a battery that is lighter, holds more energy and lasts longer than the original NiMH pack. Every custom solution is developed on the basis of a thorough analysis of the device specifications.
Pricing & warranty
Battery replacement warranty: 6 months.
If the repair cost changes during the process, the technician will call to agree on the new price. No work is done without your consent.
Frequently asked questions
Why customers choose SATER
- Custom-built battery assemblies. We design and assemble packs for the exact device — no 'close enough' substitutes.
- Sony, Samsung, LG, Panasonic, Molicel cells. Only top-tier cells — each one capacity-tested before assembly.
- Batteries for robots, power tools, laptops. We build packs for any device that runs on lithium batteries.
- 30+ years of experience. The service centre has been operating since 1993.
- We serve all of Latvia. Electronics service centre in Riga — we accept devices from anywhere in the country.