Symtech CVA-3EZ Replacement Battery 9.6V 1800mAh
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Symtech CVA-3EZ Replacement Battery 9.6V 1800mAh - 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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Symtech CVA-3EZ Replacement Battery 9.6V 1800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
9.6V
Amp
1800mAh
Symtech CVA-3EZ / HBA-5 Series — 9.6V Ni-MH Replacement Battery (SY05011500)
This is a 9.6V 1800mAh Ni-MH battery for the Symtech CVA-3EZ total station and HBA-5 / HBA-5P surveying instruments. It replaces OEM part numbers SY05011500 and SYM05011500. Capacity is rated at 1800mAh (17.28Wh) — matching the original specification.
- CVA-3EZ, HBA-5, and HBA-5P fit: These three models share the same 9.6V Ni-MH power rail, connector pinout, and BMS communication protocol — one battery pack covers all three without any modification.
- Bench tested on actual hardware: We cycled this pack through cold-start initialisation on the CVA-3EZ. The BMS held stable during sensor power-up surges and sustained measurement logging without triggering a protective cutoff.
- First-field calibration cycle: After installing a new pack, run a full calibration cycle through the instrument menu before heading into the field. The CVA-3EZ maps battery state during calibration — skip this step and the instrument will throw premature low-battery warnings on the first measurement session, even with a fully charged cell.
CVA-3EZ shutting down mid-measurement with a charged battery
The CVA-3EZ draws a short high-current spike each time the angle encoder or EDM module initialises a reading cycle. On a degraded or deeply discharged Ni-MH cell, this spike causes voltage to sag below the BMS protection threshold — triggering an immediate shutdown. A new cell at full charge holds enough internal headroom to absorb that spike without dropping out. If shutdowns happen only at the start of a measurement sequence, the spike — not total capacity — is the cause.
New pack not recognised by the instrument after sitting unused in carry case
Ni-MH packs self-discharge during storage. If the pack voltage drops below roughly 8.0V before first use, the instrument's power circuit may not detect a valid battery — it sees a voltage level consistent with a dead or absent cell. The fix is to place the pack on the OEM charger and allow a full charge cycle to complete before inserting it into the instrument. Once the BMS recovers to nominal voltage, the CVA-3EZ will recognise the pack on the next power-on.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Symtech
- 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 CVA-3EZ powers on fine but shuts off the moment I start a measurement — what's happening?
The EDM or angle encoder draws a brief current spike at the start of each measurement cycle. If the cell voltage sags under that spike — even with a "charged" indicator showing — the BMS trips a protective cutoff and the instrument shuts down. This is a cell condition issue, not a firmware or instrument fault. Install a fresh pack, run the calibration cycle through the instrument menu, then attempt the measurement again.
Readings are drifting or resetting mid-session during a logging run — is this a battery issue?
Yes. Sustained sensor load during a logging session draws more current than standby or single-shot measurements. If the cell can't hold voltage steady under that continuous draw, the instrument sees micro-dropouts — enough to reset the active measurement or corrupt a logged data point without fully shutting down. This is distinct from a full shutdown and points to voltage instability under load, not a dead cell. Replace the pack and confirm terminal voltage stays above 9.0V under load using a multimeter before deploying to site.
The replacement pack won't take a charge after the instrument sat unused for several months — why?
Ni-MH cells self-discharge continuously in storage. After several months in a carry case, pack voltage can fall low enough that the charger's detection circuit reads it as a fault rather than a discharged battery, and refuses to initiate a charge cycle. Try a charger with a manual or "force charge" mode to push a small conditioning current into the pack first. Once the pack climbs above approximately 8.4V, a standard charge cycle should complete normally.
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