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Shark SV800 Replacement Battery 10.8V 3000mAh Ni-MH XBT800

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From $83.99 USD $103.99
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Fits Shark SV800, SV800C, and VX63 handheld vacuums; replaces OEM part XBT800 and XSB800CH.
10.8V and 3000mAh delivers the motor voltage needed to sustain suction on carpet and hard floors without sag.
Slide-lock connector seats into the vacuum grip slot with a quarter-turn clockwise twist until the tab clicks.
We bench-tested the Ni-MH cell on the SV800 charger; BMS accepted handshake on first insert with no fault.
Do not leave this battery on the charging dock continuously — trickle charge degrades Ni-MH capacity faster than dock removal after full charge.
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

10.8V

Amp

3000mAh

Euro Pro Shark SV800 Series — 10.8V Ni-MH Replacement Battery (XBT800)

This 10.8V 3000mAh Ni-MH battery replaces the original pack in the Shark SV800, SV800C, VX63, and XBT800 cordless handheld vacuums. It fits the same connector and BMS interface as the factory cell. Capacity is rated at 32.4Wh — matching Euro Pro's original spec for these models.

  • SV800 and VX63 platform fit: These models share the same 10.8V cell format, connector housing, and BMS communication protocol. One replacement battery covers all variants listed without modification.
  • Bench tested on actual hardware: We cycled this cell on an SV800 chassis and confirmed the BMS accepted charge, reported state-of-charge correctly to the indicator, and delivered sustained voltage under motor load without triggering overcurrent cutoff.
  • Dock charging on the SV800: Remove the vacuum from the charging dock once the indicator shows full. The SV800 dock does not cut trickle current automatically — cells left on continuous dock charge lose capacity faster than cells charged only when depleted.

Suction dropping before the battery indicator reaches low on the SV800

Ni-MH cells show voltage sag under high motor draw before the indicator registers a low state. On the SV800, a partially blocked filter forces the motor to pull more current than its rated draw, accelerating that sag. The result is weaker suction while the indicator still reads adequate charge. Clean or replace the filter first — if suction recovers, the battery is not the fault.

Motor cutting out mid-clean and then recovering after a short pause

This is a BMS overcurrent trip, not a dead cell. When airflow is restricted — blocked filter, clogged nozzle, or sealed suction path — motor current spikes past the BMS threshold and the pack shuts output to protect the cells. The recovery after a pause is the BMS resetting once temperature drops. Clear the blockage, then confirm motor voltage holds steady at or above 10.0V under load before ruling out cell degradation.

Compatible Models

Shark SV800 Shark SV800C Shark VX63 XBT800 XBT800W Shark SV800CH

Replaces Part Numbers

XBT800 XSB800CH

Technical Specifications

Voltage10.8V
Amp Hours3000mAh
Capacity3000mAh
Rate32.4Wh
Net Weight574g /20.25 oz
Gross Weight794g /28.01 oz
Approximate Weight794g /28.01 oz
Dimension 193.80 x 57.90 x 69.50mm

Product Highlights

  • Brand: Euro Pro
  • Manufacturer: CS
  • Series: Standard
  • Color: Grey
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My SV800 loses suction halfway through cleaning but the battery light still shows it's charged — what's happening?

The Ni-MH cells in this pack sag under sustained motor load before the indicator drops to low. A restricted filter makes this worse — the motor pulls excess current, voltage dips early, and suction weakens while the gauge still reads adequate. Check and clean the filter first. If suction returns to full strength, the battery is not the cause; if it still fades, the cells have lost capacity and the pack needs replacement.

The vacuum cuts out completely during use, then works again after I let it sit for a minute — is this the battery failing?

That cutout-and-recovery pattern is the BMS tripping on an overcurrent spike, not a dead battery. It happens most often when the nozzle or filter is partially blocked — restricted airflow forces the motor to draw more than the BMS allows, so it shuts the output to protect the cells. Clear the blockage and test again. If the motor still cuts out on an unobstructed path, check that pack voltage reads at or above 10.0V under load; repeated trips at that threshold indicate cell degradation.

I left my SV800 on the dock between uses and now it barely runs — did I damage the battery?

Continuous dock charging on the SV800 does damage Ni-MH cells over time. The dock does not cut trickle current once the pack is full, so cells sit in a low-level charge state indefinitely — this accelerates capacity fade. A replacement pack will recover normal capacity, but the same dock habit will degrade it again. Charge only when the vacuum is depleted, confirm the indicator reaches full, then remove it from the dock.

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