TechniSat Techniplus 8.4V Replacement Battery 91502801
This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.
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TechniSat Techniplus 8.4V Replacement Battery 91502801 - 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.
TechniSat Techniplus 8.4V Replacement Battery 91502801 - is backordered and will ship as soon as it is back in stock.
Voltage
8.4V
Amp
3600mAh
TechniSat Techniplus — 8.4V Ni-MH Replacement Battery (91502801)
This 8.4V, 3600mAh Ni-MH battery replaces part number 91502801 in the TechniSat Techniplus line of portable survey, test, and measurement instruments. It restores field operation when the original pack has degraded past the instrument's minimum voltage threshold. Dimensions are 118.70 × 69.50 × 18.00mm — confirm physical fit before installing.
- Techniplus instrument compatibility: The Techniplus platform runs probe modules and sensor arrays from a shared 8.4V Ni-MH rail. This part number and physical form factor are specific to that platform — the connector keying and cell count match the original BMS handshake requirements.
- Bench tested on actual hardware: We ran this pack through probe initialisation cycles and sustained sensor logging draws. The BMS held steady through the current spike at probe power-up and did not trip under continuous measurement load.
- First-use calibration cycle: After installing, run a full calibration cycle through the instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session in the field.
BMS cutoff when probe module initialises on power-up
When the Techniplus powers on, the probe module draws a short inrush current as it initialises its sensor circuitry. On a degraded original pack, this spike pushes the BMS over its overcurrent threshold and the instrument shuts off immediately — often before the display fully loads. A fresh pack with full cell charge handles this spike without tripping. If the issue persists on a new battery, verify the pack is charged above 8.0V before the first power-on attempt.
Readings resetting or dropping out mid-logging session
During a sustained logging session, sensor arrays draw continuous current that causes voltage sag across aging or partially discharged cells. When pack voltage dips below the instrument's operating floor, the Techniplus briefly cuts power to non-critical modules — which registers as a data dropout or measurement reset in the log. This is not a firmware fault. Charge the pack fully before any session where continuous logging is required, and confirm resting voltage reads at least 8.2V before starting.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: TechniSat
- Manufacturer: CS
- Series: Standard
- Color: Red
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
The Techniplus powers on but shuts itself off the moment the probe module starts up — new battery, happened straight away.
The probe module draws a short inrush current spike during initialisation, and if the new pack hasn't been fully charged before first use, that spike can push the BMS over its overcurrent threshold. Charge the battery completely, then run the instrument's calibration cycle through the menu before powering the probe. This lets the instrument map the new pack's voltage curve before it sees any load. Confirm resting voltage is at or above 8.0V before attempting power-on with the probe attached.
Pack won't take a charge after the instrument sat in a carry case unused for several months.
Ni-MH cells self-discharge over time, and after months of storage the pack voltage can drop below the charger's detection threshold — the charger sees no response and stops. This is a BMS sleep condition, not a dead pack. Connect the charger and leave it for at least 30 minutes; most chargers will begin a recovery trickle once they detect a minimum cell response. If the pack recovers to 7.5V or above, proceed with a full charge cycle before use.
The Techniplus shuts down every time I start a USB data transfer to the PC — battery shows charged on the display.
USB data transfer adds a combined draw on top of the active sensor load, and if the pack's cells have shallow-cycled over time, sustained voltage under that combined load drops faster than the display indicator reflects. The instrument hits its undervoltage cutoff and shuts off mid-transfer. Charge the pack fully and re-run the instrument's calibration cycle so the voltage threshold mapping updates to the current cell state. If the problem continues, check that resting voltage holds above 8.2V for at least five minutes after removing the charger before starting any transfer session.
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