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SUPRO EVS-C11 MAX Replacement Battery 22.2V 2200mAh

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From $81.99 USD $100.99
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Fits SUPRO EVS-C11 MAX and EVS-C11 MAX-DC cordless stick vacuums; replaces OEM part number A11.
22.2V lithium-ion at 2200mAh delivers 48.84Wh to sustain motor draw through full cleaning cycles.
Slides into the battery slot with vertical orientation; connector seats flush and locks without force.
We bench tested this cell on the EVS-C11 MAX motor load; BMS held steady under sustained suction draw with no early cutoff events.
Do not leave the battery on the charging dock continuously — cordless vacuums develop capacity fade significantly faster under perpetual trickle charge than when removed after reaching full.
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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.

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⚠️ 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

22.2V

Amp

2200mAh

SUPRO EVS-C11 MAX / EVS-C11 MAX-DC — 22.2V Li-ion Replacement Battery (A11)

This is a 22.2V 2200mAh Li-ion replacement battery for the SUPRO EVS-C11 MAX and EVS-C11 MAX-DC cordless stick vacuums. It slots in where the original A11 pack sits and restores full motor voltage to the cleaning head. Capacity is 2200mAh (48.84Wh), matching the factory specification.

  • EVS-C11 MAX and MAX-DC compatibility: Both variants run the same 22.2V six-cell architecture and share the A11 connector and BMS handshake profile. One battery covers both models without modification.
  • Bench tested on actual hardware: We cycled this pack through motor-start loads on the EVS-C11 MAX. The BMS handled the inrush current at startup without tripping, and cell voltage held steady across sustained suction draws on the cleaning head.
  • Dock charging habit on cordless vacuums: Do not leave the EVS-C11 MAX sitting on its charging dock continuously. Cordless vacuums on permanent dock charge develop capacity fade faster than units charged only when depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

The EVS-C11 MAX motor draws significantly more current when the filter is partially blocked. Under that restricted load, cell voltage sags earlier than the indicator circuit expects, so the vacuum feels underpowered while the gauge still reads mid-range. This is not battery failure — it is the BMS reducing output to stay within safe discharge limits under a higher-than-rated draw. Clean or replace the filter first, then retest. If suction recovers immediately, the battery is fine.

Motor cutting out briefly then recovering during a cleaning pass

Short cutouts that self-recover within a few seconds point to a BMS overcurrent trip, not a failed cell. This happens when sustained suction against a blockage — packed carpet fibres, a clogged inlet — forces the motor to draw above the BMS current threshold. The BMS interrupts current, waits for the draw to drop, then resets automatically. Clear the blockage, check the filter, and confirm the pack voltage reads at least 21V on a multimeter before ruling out a degraded cell.

Compatible Models

EVS-C11 MAX EVS-C11 MAX-DC

Replaces Part Numbers

A11

Technical Specifications

Voltage22.2V
Amp Hours2200mAh
Capacity2200mAh
Rate48.84Wh
Gross Weight550g /19.40 oz
Approximate Weight550g /19.40 oz

Product Highlights

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

Frequently Asked Questions

My SUPRO EVS-C11 MAX loses suction well before the battery light turns red — is the new battery doing the same thing?

A partially blocked filter forces the motor to pull more current than rated, which causes the BMS to sag cell voltage early — the indicator lags behind what the cells are actually doing. Clean or replace the filter and run the vacuum again. If suction holds longer after the filter is cleared, the battery is working correctly. Check filter condition before assuming the pack is at fault.

The EVS-C11 MAX cuts out for a few seconds mid-clean then kicks back on — what triggers that?

That self-recovering cutout is the BMS tripping on overcurrent, usually caused by the motor straining against a blocked inlet or compacted carpet debris. The BMS interrupts current briefly to protect the cells, then resets once the draw drops back to safe levels. Clear any blockage at the inlet and nozzle, then retest on an open hard floor. If the cutout stops, the pack is fine — the fault was load, not the battery.

I charged the replacement A11 battery fully but the SUPRO EVS-C11 MAX runtime feels shorter than expected straight out of the box — why?

New Li-ion cells often need two to three full charge and discharge cycles before they reach rated capacity. On the first use, available capacity can read 10–15% below the 2200mAh spec. Run the battery down to the low-indicator cutoff, charge fully to 25.2V, and repeat that cycle twice. Runtime typically stabilises to full spec by the third cycle.

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