Head to head
Topdon BT100 vs Foxwell BT-705
Our pick
Topdon BT100
Battery Analyzers
Why this one
- The Topdon BT100 checks cranking and charging systems alongside 12V batteries, helping you investigate starting problems with one tester.1


Product photographs. Not to scale.
What Foxwell BT-705 offers
The Foxwell BT-705 accepts battery ratings from 100 to 2,000 CCA and lists flooded, AGM flat-plate, AGM spiral and gel batteries, covering several common battery constructions with one tester.23
What differs
| Specification | Topdon BT100 | Foxwell BT-705 |
|---|---|---|
| Voltages supported | 12V1 | 12V & 24V2 |
| Battery types tested | regular flooded, AGM flat plate, AGM spiral, GEL, and EFB batteries1 | regular flooded, AGM flat plate, AGM spiral and GEL3 |
| Warranty | 24 months1 | 12 months3 |
More details
| Specification | Topdon BT100 | Foxwell BT-705 |
|---|---|---|
| Test method | Conductance4 | Conductance2 |
| Cranking test | Yes1 | Yes5 |
| Charging system test | Yes1 | Yes5 |
| Testing capacity | 100–2,000 CCA1 | 100–2,000 CCA2 |
| Lowest voltage it reads | Not published | Not published |
| Built-in printer | No6 | No5 |
| Display | Backlit lcd1 | Not published |
| Lead length | Not published | ≈1.8 m (5.9 ft)7 |