SPTA 18V Cordless 15mm Kit
#3 in CordlessFull review
A complete cordless 15 mm kit at a low price, for occasional use where there is no outlet nearby.
Amazon $259.99$259.99
The SPTA 18V Cordless 15mm Kit is the better dual action car polisher overall, rated 3.1 to 2.3. The SPTA 18V Cordless 15mm Kit leads on value and features. The DeWalt DCM848 20V MAX XR Kit wins on warranty. The SPTA 18V Cordless 15mm Kit costs $290 less ($259.99 vs $549.99).
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.
DeWalt DCM848 20V MAX XR Kit
#5 in CordlessFull review
A cordless polisher kit for DeWalt 20V owners, though its maker doesn’t publish a usable orbit size.
Amazon $549.99$549.99
Which should you buy?
- Choose the SPTA 18V Cordless 15mm Kit for value ($259.99 vs $549.99) and features (brushless motor, cordless or a 20 ft+ cord, lock-on trigger vs brushless motor, cordless or a 20 ft+ cord).
- Choose the DeWalt DCM848 20V MAX XR Kit for warranty (3-year warranty vs 6-month warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every cordless dual action car polisher; a clear win is highlighted. How we rank explains each one.
| Factor weight | SPTA 18V Cordless 15mm Kit | DeWalt DCM848 20V MAX XR Kit |
|---|---|---|
| Overall rating | 3.1/5 | 2.3/5 |
| Correction 30% | 62 15 mm orbit | 0 orbit not published, scored as the smallest |
| Value 25% | 47 $259.99 | 5 $549.99 |
| Warranty 15% | 0 6-month warranty | 50 3-year warranty |
| Power 10% | 50 18 V battery; cordless makers publish no motor rating (neutral score used) | 50 20 V battery; cordless makers publish no motor rating (neutral score used) |
| Weight 10% | 50 weight not published (neutral score used) | 50 weight not published (neutral score used) |
| Features 10% | 50 brushless motor, cordless or a 20 ft+ cord, lock-on trigger | 35 brushless motor, cordless or a 20 ft+ cord |
Specifications
| SPTA 18V Cordless 15mm Kit | DeWalt DCM848 20V MAX XR Kit | |
|---|---|---|
| Polishing | ||
| Orbit diameter | 15 mm | - |
| Speed range | 2,000-4,800 OPM | 2,000-5,500 OPM |
| Backing plate | - | 5 in |
| Forced rotation | No | No |
| Power | ||
| Power source | Cordless | Cordless |
| Battery | 18 V | 20 V |
| Batteries included | Yes | Yes |
| Cord | Cordless | Cordless |
| Brushless motor | Yes | Yes |
| Controls | ||
| Constant-speed electronics | Not listed | Not listed |
| Soft start | Not listed | Not listed |
| Lock-on trigger | Yes | Not listed |
| Build | ||
| Pads or polish included | Yes | Yes |
| Warranty | 6 months | 3 years |