Foxwell BT705
A sturdy 12 V and 24 V tester with a cable long enough to run the starter test alone, and a longer warranty than most.
Amazon $106.99$106.99
The Foxwell BT705 rates 3.6 among digital testers car battery testers; the Foxwell BT780 rates 3.4 among with printer ones. The Foxwell BT705 costs $113 less ($106.99 vs $219.99).
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.
Foxwell BT780
#5 in With printerFull review
A shop tester that keeps working on a nearly flat battery and prints branded reports.
Amazon $219.99$219.99
Scores side by side
These two sit in different type classes (digital testers and with printer), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Foxwell BT705 | Foxwell BT780 |
|---|---|---|
| Overall rating | 3.6/5 | 3.4/5 |
| Price 25% | 67 $106.99 | 36 $219.99 |
| Battery coverage 25% | 80 up to 2,000 CCA, 24 V systems | 80 up to 2,000 CCA, 24 V systems |
| System tests 20% | 80 tests the starter, charging system | 80 tests the starter, charging system |
| Features or load 20% | 10 cable of 5 ft or more | 45 built-in printer, own battery, cable of 5 ft or more |
| Warranty 10% | 50 2-year warranty | 0 warranty not published, scored as none |
Specifications
| Foxwell BT705 | Foxwell BT780 | |
|---|---|---|
| Testing | ||
| Type | Conductance (digital) | Conductance (digital) |
| Battery voltages | 12/24 V | - |
| System voltages | 12/24 V | 12/24 V |
| Rating range | 100-2,000 CCA | 100-2,000 CCA |
| Battery types | Flooded, AGM, gel, EFB | Flooded, AGM flat plate, AGM spiral, EFB, gel, start-stop |
| Lithium batteries | No | No |
| Rating standards | - | CCA, CA, MCA, JIS, DIN, IEC, EN, SAE |
| Starter test | Yes | Yes |
| Charging system test | Yes | Yes |
| Features | ||
| Display | 2.8 in screen | 3.2 in LCD |
| Built-in printer | - | Yes |
| Own battery | - | Yes |
| Cable length | 5.9 ft | 6.5 ft |
| Build | ||
| Warranty | 2 years | - |