Head to head
Topdon BT100 vs Foxwell BT780
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 BT780 offers
The built-in printer gives you a paper record of the battery test to keep or hand to a customer.2
What differs
| Specification | Topdon BT100 | Foxwell BT780 |
|---|---|---|
| Voltages supported | 12V1 | 12V & 24V3 |
| Battery types tested | regular flooded, AGM flat plate, AGM spiral, GEL, and EFB batteries1 | Regular Flooded, AGM Flat Plate, AGM Spiral and GEL, Start-Stop AGM and EFP Batteries2 |
| Built-in printer | No4 | Yes2 |
More details
| Specification | Topdon BT100 | Foxwell BT780 |
|---|---|---|
| Test method | Conductance5 | Conductance3 |
| Cranking test | Yes1 | Yes3 |
| Charging system test | Yes1 | Yes3 |
| Testing capacity | 100–2,000 CCA1 | Not published |
| Lowest voltage it reads | Not published | Not published |
| Display | Backlit lcd1 | Not published |
| Lead length | Not published | Not published |
| Warranty | 24 months1 | Not published |