Ancel BA101 Plus
A good fit for a garage with motorcycles, mowers and cars, since it tests 6 V and 12 V batteries and keeps a long test history.
Amazon $69.99$69.99
The Ancel BA101 Plus is the better car battery tester overall, rated 3.8 to 3.6. The Ancel BA101 Plus leads on price, system tests and features or load. The Foxwell BT705 wins on warranty. The Ancel BA101 Plus costs $37 less ($69.99 vs $106.99).
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 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
Which should you buy?
- Choose the Ancel BA101 Plus for price ($69.99 vs $106.99), system tests (tests the starter, charging system, ripple or diode vs tests the starter, charging system) and features or load (color or phone screen, stored results vs cable of 5 ft or more).
- Choose the Foxwell BT705 for warranty (2-year warranty vs 1-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every digital testers car battery tester; a clear win is highlighted. How we rank explains each one.
| Factor weight | Ancel BA101 Plus | Foxwell BT705 |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Price 25% | 85 $69.99 | 67 $106.99 |
| Battery coverage 25% | 80 up to 2,000 CCA, 6 V batteries | 80 up to 2,000 CCA, 24 V systems |
| System tests 20% | 100 tests the starter, charging system, ripple or diode | 80 tests the starter, charging system |
| Features or load 20% | 25 color or phone screen, stored results | 10 cable of 5 ft or more |
| Warranty 10% | 0 1-year warranty | 50 2-year warranty |
Specifications
| Ancel BA101 Plus | Foxwell BT705 | |
|---|---|---|
| Testing | ||
| Type | Conductance (digital) | Conductance (digital) |
| Battery voltages | 6/12 V | 12/24 V |
| System voltages | 6/12 V | 12/24 V |
| Rating range | 20-2,000 CCA | 100-2,000 CCA |
| Battery types | Flooded, AGM flat plate, AGM spiral, gel, EFB | Flooded, AGM, gel, EFB |
| Lithium batteries | No | No |
| Starter test | Yes | Yes |
| Charging system test | Yes | Yes |
| Ripple or diode test | Yes | - |
| Features | ||
| Display | 2.8 in color LCD | 2.8 in screen |
| Stores results | Yes | - |
| Cable length | - | 5.9 ft |
| Build | ||
| Warranty | 1 year | 2 years |