Product Manual

CS851 Shark Evo Power System IQ Plus AED

Discover the clever convenience of Shark's updated cordless stick vacuum. The CS851 model features a powerful suction and an auto-empty dock for easy debris disposal, giving you one less task to worry about.



If the charging cord plug does not fit fully into the outlet, reverse the plug.

If it still does not fit, contact a qualified electrician. DO NOT force into outlet or try to modify to fit.

To reduce the risk of shock and unintended operation, turn off power and remove the battery before servicing.


    To reduce the risk of injury, fire, electric shock, and property damage resulting from improper use of the appliance, carefully observe the following instructions. This unit contains electrical connections and moving parts that potentially present risk to the user.


    1. This vacuum consists of a motorised nozzle, wand, and handheld vacuum. These components contain electrical connections, electrical wiring, and moving parts that potentially present risk to the user.

    2. Before each use, carefully inspect all parts for any damage. If a part is damaged, discontinue use.

    3. Use only identical replacement parts.

    4. This vacuum contains no serviceable parts.

    5. Use only as described in this manual. DO NOT use the vacuum for any purpose other than those described in this manual.

    6. With the exception of the filters and dust cup, DO NOT expose any parts of the vacuum to water or other liquids.

    7. Keep the appliance and its cord out of reach of children. Do not allow the appliance to be used by children. Do not allow to be used as a toy. Close supervision is necessary when used near children.


    8. This appliance can be used by persons with reduced physical, sensory or mental capabilities or lack of experience or knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Cleaning and user maintenance shall not be made by children.

    9. Always turn off the vacuum beforeconnecting or disconnecting any currentcarrying hoses, motorised nozzles,chargers, batteries, or other electrical ormechanical parts.

    10. DO NOT handle plug or vacuum with wet hands.

    11. DO NOT use without dust cup, filters, and brushroll in place.

    12. Only use Shark® branded filters and accessories.

    13. DO NOT put any objects into nozzle or accessory openings. DO NOT use with any opening blocked; keep free of dust, lint, hair, and anything that may reduce airflow.

    14. DO NOT use if nozzle or accessory airflow is restricted. If the air paths or the motorised floor nozzle become blocked, turn the vacuum off. Remove all obstructions before you turn on the unit again.

    15. Keep nozzle and all vacuum openings away from hair, face, fingers, uncovered feet, or loose clothing.

    16. DO NOT use if vacuum is not working as it should, or has been dropped, damaged, left outdoors, or dropped into water.

    17. Use extra care when cleaning on stairs.

    18. DO NOT leave the vacuum unattended while powered on.

    19. When powered on, keep the vacuum moving over the carpet surface at all times to avoid damaging the carpet fibers.

    20. DO NOT place vacuum on unstable surfaces such as chairs or tables.

    21. DO NOT use to pick up:

    a) Liquids
    b) Large objects
    c)Hard or sharp objects (glass, nails, screws, or coins)
    d) Large quantities of dust (including drywall, fireplace ash, or embers). DO NOT use as an attachment to power tools for dust collection.
    e) Smoking or burning objects (hot coals, cigarette butts, or matches)
    f) Flammable or combustible materials (lighter fluid, gasoline, or kerosene)
    g) Toxic materials (chlorine bleach, ammonia, or drain cleaner)

  • 22. DO NOT use in the following areas:

    a) Poorly lit areas
    b) Wet or damp surfaces
    c) Outdoor areas
    d) Spaces that are enclosed and may contain explosive or toxic fumes or vapors (lighter fluid, gasoline, kerosene, paint, paint thinners, mothproofing substances, or flammable dust)

    23. Turn off the vacuum before plugging in or unplugging the charger.

    24. Turn off the vacuum before any adjustment, cleaning, maintenance, or troubleshooting.

    25. During cleaning or routine maintenance, DO NOT cut anything other than hair, fibers, or string wrapped around the brushroll.

    26. Allow all filters to air-dry completely before replacing in the vacuum to prevent liquid from being drawn into electric parts.

    27. DO NOT modify or attempt to repair the vacuum or the battery yourself, except as indicated in this manual. DO NOT use the battery or vacuum if it has been modified or damaged. Damaged or modified batteries may exhibit unpredictable behavior resulting in fire, explosion or risk of injury.

    28. Turn off all controls before unplugging.

    29. Always turn off this appliance before connecting or disconnecting motorised nozzle or hand tool.


    30. The battery is the power source for the vacuum. Carefully read and follow all charging instructions.

    31. To prevent unintentional starting, ensure the vacuum is powered off before picking up or carrying the vacuum. DO NOT carry the appliance with your finger on the power switch.

    32. Use only Shark® dock charger XDCKCS851PHMVAE. Use of an incorrect charger may result in no charging, and/or unsafe conditions.

    33. Use only with Shark battery pack XSBT330AS.

    34. Keep the battery away from all metal objects such as paper clips, coins, keys, nails, or screws. Shorting the battery terminals increases the risk of fire or burns.

    35. Under abusive conditions, liquid may be ejected from the battery. Avoid contact with this liquid, as it may cause irritation or burns. If contact occurs, flush with water. If liquid contacts eyes, seek medical help.

    36. Battery should not be stored at temperatures below 37.4°F (3°C) or above 104°F (40°C) to maintain long-term battery life.

    37. DO NOT charge battery at temperatures below 40°F (5°C) or above 104°F (40°C).

    38. Store the appliance indoors. DO NOT use or store it below 37.4°F (3°C). Ensure the appliance is at room temperature before operating.

    39. DO NOT expose the battery to fire or temperatures above 265°F (130°C) as it may cause explosion.

    40. If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons in order to avoid a hazard.

Download the full owner's guide here.