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 battery coverage and features or load. The Topdon BT100 wins on price. The Topdon BT100 costs $16 less ($53.99 vs $69.99).
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.
Topdon BT100
A low-cost 12 V tester for a car owner who wants to check a battery, starter and alternator at home.
Amazon $53.99$53.99
Which should you buy?
- Choose the Ancel BA101 Plus for battery coverage (up to 2,000 CCA, 6 V batteries vs up to 2,000 CCA) and features or load (color or phone screen, stored results vs none of the listed features).
- Choose the Topdon BT100 for price ($53.99 vs $69.99).
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 | Topdon BT100 |
|---|---|---|
| Overall rating | 3.8/5 | 3.6/5 |
| Price 25% | 85 $69.99 | 97 $53.99 |
| Battery coverage 25% | 80 up to 2,000 CCA, 6 V batteries | 60 up to 2,000 CCA |
| System tests 20% | 100 tests the starter, charging system, ripple or diode | 100 tests the starter, charging system, ripple or diode |
| Features or load 20% | 25 color or phone screen, stored results | 0 none of the listed features |
| Warranty 10% | 0 1-year warranty | 0 warranty not published, scored as none |
Specifications
| Ancel BA101 Plus | Topdon BT100 | |
|---|---|---|
| Testing | ||
| Type | Conductance (digital) | Conductance (digital) |
| Battery voltages | 6/12 V | 12 V |
| System voltages | 6/12 V | 12 V |
| Rating range | 20-2,000 CCA | 100-2,000 CCA |
| Battery types | Flooded, AGM flat plate, AGM spiral, gel, EFB | Flooded, AGM flat plate, AGM spiral, EFB, gel |
| Lithium batteries | No | - |
| Starter test | Yes | Yes |
| Charging system test | Yes | Yes |
| Ripple or diode test | Yes | Yes |
| Features | ||
| Display | 2.8 in color LCD | - |
| Stores results | Yes | No |
| Build | ||
| Warranty | 1 year | - |