FJC 45115 500 Amp
#2 in Load testersFull review
A plain 500 A carbon-pile tester for 12 V batteries up to 1,000 CCA at a lower price than the Solar 1874.
Amazon $115.20$115.20
The FJC 45115 500 Amp is the better car battery tester overall, rated 3.3 to 3.1. The FJC 45115 500 Amp leads on features or load. The Schumacher BT-100 wins on price. The Schumacher BT-100 costs $60.21 less ($54.99 vs $115.20).
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.
Schumacher BT-100
#5 in Load testersFull review
A classic, low-cost load tester for checking 6 V and 12 V batteries under a real load.
Amazon $54.99$54.99
Which should you buy?
- Choose the FJC 45115 500 Amp for features or load (500 A load vs 100 A load).
- Choose the Schumacher BT-100 for price ($54.99 vs $115.20).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every load testers car battery tester; a clear win is highlighted. How we rank explains each one.
| Factor weight | FJC 45115 500 Amp | Schumacher BT-100 |
|---|---|---|
| Overall rating | 3.3/5 | 3.1/5 |
| Price 25% | 64 $115.20 | 96 $54.99 |
| Battery coverage 25% | 17 up to 1,000 CCA | 20 CCA range not published, scored as the bottom of the scale, 6 V batteries |
| System tests 20% | 80 tests the starter, charging system | 80 tests the starter, charging system |
| Features or load 20% | 70 500 A load | 0 100 A load |
| Warranty 10% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| FJC 45115 500 Amp | Schumacher BT-100 | |
|---|---|---|
| Testing | ||
| Type | Carbon pile | Fixed load |
| Battery voltages | 12 V | 6/12 V |
| System voltages | - | 6/12 V |
| Rating range | up to 1,000 CCA | - |
| Load current | 500 A | 100 A |
| Starter test | Yes | Yes |
| Charging system test | Yes | Yes |
| Features | ||
| Display | - | Analog |