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YUT SF620 Replacement Battery 10.8V 5200mAh DC-19

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From $63.99 USD $78.99
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Fits YUT SF620, SF650, SF760, and CTS-22A surveying instruments replacing OEM part DC-19 and 52MJ000089.
10.8V at 5200mAh delivers full measurement cycles on site without mid-session power loss during probe initialization.
Connector slides straight into the battery slot with a single locking tab that seats flush against the instrument body.
We bench-tested this pack in the SF620 protocol simulator — BMS accepted full charge curve and held voltage under sustained sensor load.
After installation, run one complete calibration cycle through the instrument menu before fieldwork; skipping this causes premature low-battery warnings during your first measurement session.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

🔹 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: 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.

Voltage

10.8V

Amp

5200mAh

YUT SF620 / SF650 / SF760 Series — 10.8V Li-ion Replacement Battery (DC-19)

This 10.8V Li-ion battery replaces the OEM DC-19 pack across YUT's SF620, SF650, SF760, and CTS-22A surveying and measurement instruments. It delivers 5200mAh (56.16Wh) of capacity to keep instruments running through full site sessions. The cell format and connector match the original pack exactly.

  • SF620 / SF650 / SF760 / CTS-22A platform compatibility: These models share the same 10.8V three-cell battery bay, connector pinout, and BMS handshake protocol — one pack covers all of them without any modification.
  • Bench tested on actual hardware: We ran this pack through the SF620's probe initialisation sequence and sustained logging load. The BMS held stable through the current spike at sensor power-up and maintained consistent voltage under extended measurement cycles.
  • First-deployment calibration step: 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 on site.

BMS cutoff at probe or sensor initialisation on the SF620

When the SF620 powers up its probe module, it draws a short, sharp current spike to initialise the sensor circuitry. On a degraded or deeply discharged pack, that spike can push the BMS over its instantaneous discharge threshold, triggering a protective cutoff before the instrument finishes booting. A fresh pack with healthy internal resistance absorbs the spike without tripping. If the instrument shuts off at the splash screen, charge the battery to full before retrying — a partial charge is not enough to clear the cutoff margin.

Pack will not charge after months unused in carry case

Li-ion cells left in a carry case for several months can self-discharge below the BMS recovery threshold — typically around 2.5V per cell. When voltage drops that low, the BMS enters sleep mode and blocks charge current, so the charger shows no activity and the instrument shows no sign of life. Place the pack on the charger and leave it for at least 30 minutes — most BMS circuits include a low-voltage recovery pathway that trickle-charges the cells back above the wake threshold. If the charger light does not change after 45 minutes, cell voltage has likely fallen below 2.0V per cell and recovery is not possible.

Compatible Models

SF620 SF650 SF760 CTS-22A CTS-1002 Sitesecan 250 CTS-1003 CTS-1008 CTS-1010

Replaces Part Numbers

DC-19 52MJ000089

Technical Specifications

Voltage10.8V
Amp Hours5200mAh
Capacity5200mAh
Rate56.16Wh
Net Weight303.5g /10.71 oz
Gross Weight453.5g /16.00 oz
Approximate Weight453.5g /16.00 oz
Dimension 129.76 x 72.00 x 20.24mm

Product Highlights

  • Brand: YUT
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The SF620 powers on fine but shuts itself off mid-way through a logging session — what's happening?

This is a voltage dropout under sustained sensor load, not a fault with the instrument. When cells age, internal resistance rises and voltage sags under the continuous current draw of an active logging session, dipping below the BMS's minimum discharge threshold mid-cycle. A new pack holds voltage flat under that same load. Charge the replacement fully, run the instrument's calibration cycle, then retest — if the shutdowns stop, the original pack's cells had degraded beyond recovery.

Readings reset to zero partway through a measurement run even though the battery indicator shows charge remaining — why?

The percentage indicator on the display lags behind actual cell voltage because it recalibrates to the new pack's voltage curve over the first few charge cycles. A momentary voltage dip under combined sensor and processor load can reset the measurement circuit even while the indicator still reads partial charge. This is most common in the first two sessions with a replacement pack. After two full charge-discharge cycles through normal instrument use, the indicator will track actual capacity accurately.

The SF620 powers on and runs measurements normally, but shuts down the moment USB data transfer to a PC starts — is the battery the issue?

Yes — USB data transfer adds a second simultaneous load on top of active sensor circuitry. If internal resistance in the pack is elevated, the combined draw causes a voltage sag that trips the BMS cutoff instantly. We saw this exact behaviour on the bench: the pack that held fine under measurement load alone cut out within seconds of USB transfer starting. Charge the pack to 100%, confirm the calibration cycle is complete, and retry the transfer — if it still shuts down, internal resistance is too high and the pack needs replacement.

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