The Clarke MA50 15B is the better floor scrubber overall, rated 2.9 to 2.8. The Clarke MA50 15B leads on warranty. The Karhdir C4 15 in wins on value and recovery tank. The Karhdir C4 15 in costs $2,842.15 less ($1,619 vs $4,461.15).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
A battery disc scrubber for convenience stores, clinics and classrooms that need a couple of hours of cordless scrubbing. It is priced well above import machines of the same width.
Amazon $4,461.15An inexpensive battery scrubber with large tanks for a 15 in machine, for small warehouses and shops on a budget. Its runtime is not published.
Amazon $1,619Each factor is scored 0-100 against the same fixed reference points for every under 17 in floor scrubber; a clear win is highlighted. How we rank explains each one.
| Factor weight | Clarke MA50 15B | Karhdir C4 15 in |
|---|---|---|
| Overall rating | 2.9/5 | 2.8/5 |
| Value 30% | 16 $297.41 per inch of path ($4,461.15, 15 in) | 69 $107.93 per inch of path ($1,619, 15 in) |
| Cleaning path 20% | 31 15 in cleaning path | 31 15 in cleaning path |
| Recovery tank 15% | 46 3.5 gal recovery tank | 59 5 gal recovery tank |
| Runtime 15% | 43 2 h per charge | 0 battery runtime not published, scored as zero |
| Noise 5% | 33 70 dB(A) | 50 sound level not published (neutral score used) |
| Warranty 15% | 100 5-year parts warranty | 0 1-year parts warranty |
| Clarke MA50 15B | Karhdir C4 15 in | |
|---|---|---|
| Cleaning | ||
| Cleaning path | 15 in | 15 in |
| Squeegee width | 20 in | 23 in |
| Brush type | Disc | - |
| Brush speed | 150 rpm | 200 rpm |
| Brush pressure | 44.5 lb | - |
| Maker productivity claim (not scored) | 8,000 sq ft/h | 24,000 sq ft/h |
| Tanks | ||
| Solution tank | 3.5 gal | 6 gal |
| Recovery tank | 3.5 gal | 5 gal |
| Power | ||
| Power | Battery (AGM) | Battery |
| Voltage | 24 V | - |
| Runtime per charge | 2 h | - |
| Build | ||
| Noise | 70 dB(A) | - |
| Weight | 124 lb | 147 lb |
| Parts warranty | 5 years | 1 year |
| Labor warranty | 2 years | - |
