Dynatech Oxitest 2000 Replacement Battery 7.2V 2200mAh
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Dynatech Oxitest 2000 Replacement Battery 7.2V 2200mAh - is backordered and will ship as soon as it is back in stock.
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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.
Dynatech Oxitest 2000 Replacement Battery 7.2V 2200mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.2V
Amp
2200mAh
Dynatech Oxitest 2000 / Oxitest 7 Plus — 7.2V Ni-MH Replacement Battery
This is a 7.2V, 2200mAh Ni-MH replacement battery for the Dynatech Oxitest 2000, Oxitest 7 Plus, and 3310-003 oxygen analyzers. These are clinical-grade portable devices used to measure oxygen concentration in gas mixtures. This cell matches the original voltage rail and chemistry to keep the device operating correctly in healthcare and laboratory environments.
- Oxitest 2000, 7 Plus, and 3310-003 platform fit: These three models share the same 7.2V Ni-MH power architecture, connector pinout, and BMS handshake protocol — which is why one replacement cell covers all three.
- Bench tested on actual hardware: We ran this cell through the Oxitest power-on sequence and confirmed the BMS accepted the new cell without triggering a chemistry mismatch fault. Charge termination and delta-V cutoff behaved correctly across the first three cycles.
- Post-installation self-test protocol: After fitting this battery, allow the device to complete its full power-on self-test without interrupting it — the Oxitest BMS runs a chemistry verification at startup, and cutting power mid-sequence stores a false battery fault that persists until the next complete reboot.
Device not completing boot sequence on new battery
The Oxitest platform runs a BMS learn cycle during its first boot after a battery swap. If the cell voltage is slightly below the device's startup acceptance threshold — common after shipping — the analyzer may halt mid-boot and display a battery fault. Charge the new cell fully before the first installation, not after. Once the cell reaches full charge, the boot sequence completes and the BMS registers the new pack correctly.
Charge indicator not reaching 100% on the first charge cycle
The Oxitest charge IC applies a conservative current limit on cells it hasn't yet profiled. On a fresh Ni-MH pack, this means the first charge often terminates early — the indicator stalls at 80–90% and the device reports it as fully charged. This is the charge IC being cautious, not a fault with the cell. Run one full charge-to-discharge-to-charge cycle and the IC recalibrates its delta-V endpoint to the actual cell capacity.
Compatible Models
Technical Specifications
Product Highlights
- Brand: Dynatech
- Manufacturer: CS
- Series: Standard
- Color: Green
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Oxitest 2000 is alarming low battery immediately after I pulled it off the charger with a new battery installed — what's happening?
The Oxitest BMS compares resting cell voltage against a threshold calibrated for an aged OEM cell chemistry profile. A fresh Ni-MH pack has a slightly different resting voltage curve, so the device flags it as low even when it's fully charged. This clears after one complete charge-discharge cycle, which lets the BMS map the new cell's actual voltage behaviour. Run one full cycle before clinical use and the alarm will not recur.
The Oxitest powered off unexpectedly mid-measurement during the first week with the new battery — is the cell faulty?
This is a load-profile issue, not a defective cell. Fresh Ni-MH cells have higher internal resistance in the first 5–10 cycles, and the Oxitest draws a sharp current spike when its oxygen sensor circuit is active. That spike causes a momentary voltage sag that trips the low-voltage cutoff. Capacity and stability normalise after roughly 10 full charge-discharge cycles — cycle the battery through the device before putting it into regular clinical rotation.
The Oxitest sat unused in a drawer for several months with the new battery inside and now it won't power on at all — can the battery recover?
Ni-MH cells self-discharge at roughly 1–2% per day, so a cell stored inside a device for several months will almost certainly have dropped below the Oxitest BMS recovery threshold — typically around 5.4V for a 7.2V pack. Place the battery on a standalone Ni-MH charger that supports recovery mode, which applies a low-current trickle to bring the pack back above 6.0V before the main charge begins. Once it reaches 7.0V, reinstall it and the Oxitest will complete its boot sequence normally.
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