Black+Decker LSTE523 20V Trimmer/Edger
#17 in BatteryFull review
A budget trimmer and edger for small yards and touch ups. Look elsewhere for overgrowth or large lawns.
Amazon $109$109
The Black+Decker LSTE523 20V Trimmer/Edger is the better string trimmer overall, rated 3.2 to 3.0. The Black+Decker LSTE523 20V Trimmer/Edger leads on value. The Sun Joe 24V-ST14 12 in Trimmer/Edger wins on weight. The Black+Decker LSTE523 20V Trimmer/Edger costs $30.99 less ($109 vs $139.99).
Sun Joe 24V-ST14 12 in Trimmer/Edger
#21 in BatteryFull review
A light, low cost trimmer and edger for tidying small lawns, walkways and flower beds.
Amazon $139.99$139.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Black+Decker LSTE523 20V Trimmer/Edger for value ($9.08 per inch of swath ($109 with batteries and charger, 12 in swath) vs $11.67 per inch of swath ($139.99 with batteries and charger, 12 in swath)).
- Choose the Sun Joe 24V-ST14 12 in Trimmer/Edger for weight (5.6 lb (with battery) vs 7.6 lb).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every battery string trimmer; a clear win is highlighted. How we rank explains each one.
| Factor weight | Black+Decker LSTE523 20V Trimmer/Edger | Sun Joe 24V-ST14 12 in Trimmer/Edger |
|---|---|---|
| Overall rating | 3.2/5 | 3.0/5 |
| Value 30% | 88 $9.08 per inch of swath ($109 with batteries and charger, 12 in swath) | 66 $11.67 per inch of swath ($139.99 with batteries and charger, 12 in swath) |
| Line 20% | 0 .065 in line | 0 .063 in line |
| Swath 15% | 20 12 in swath | 20 12 in swath |
| Weight 15% | 90 7.6 lb | 100 5.6 lb (with battery) |
| Warranty 20% | 25 2-year warranty | 25 2-year warranty |
Specifications
| Black+Decker LSTE523 20V Trimmer/Edger | Sun Joe 24V-ST14 12 in Trimmer/Edger | |
|---|---|---|
| Cutting | ||
| Cutting swath | 12 in | 12 in |
| Largest line | .065 in | .063 in |
| Line feed | Push-button feed | Automatic feed |
| Shaft | Straight | Straight |
| Converts to edger | Yes | Yes |
| Takes attachments | No | No |
| Power | ||
| Engine or battery | 20 V, 2.5 Ah of battery | 24 V, 4 Ah of battery |
| Battery energy | 45 Wh | 96 Wh |
| Battery included | Yes | Yes |
| Runtime | - | 35 min |
| Brushless motor | - | Yes |
| Build | ||
| Weight | 7.6 lb | 5.6 lb (with battery) |
| Warranty | 2 years | 2 years |