1 / 7FOXWELL BT705 PLUS 12V/24V Battery Tester
The FOXWELL BT705 PLUS is a battery, cranking, and charging-system tester for 12V batteries and 12V/24V vehicle systems. It reports battery health and starting or charging measurements, but it does not charge batteries or scan OBD2 codes.
At a glance
- Runs from the battery being tested, with no separate tester power source specified.
- Three diagnostic modes cover battery condition, cranking, and charging system checks.
- The display reports measures including state of health, state of charge, CCA, cranking voltage and time, charging voltage, and ripple.
- The listing specifies 12V battery testing and 12V/24V vehicle system checks.
Often bought together
Pros and cons
Pros
- Combines battery, cranking, and charging diagnostics in one tester.
- Long cables are listed as 5.9 ft, supporting testing from the driver’s seat as described by the manufacturer.
- The manufacturer lists compatibility with flooded, AGM, spiral, and GEL batteries.
Cons
- Not suitable for lithium batteries, and it does not charge batteries or read OBD2 codes.
Technical specifications
14 specifications| Brand | FOXWELL |
|---|---|
| Model | BT705 PLUS |
| Power configuration | Powered By the Battery Being Tested. ①30% Quicker Response Time ②complete Battery Health Check ③easy to Use, Simple to Understand |
|---|---|
| Supported battery types | Flooded, AGM, Spiral, and GEL batteries (not for lithium) |
| Battery test system | 12V battery health testing |
| Vehicle system checks | 12V/24V cranking and charging system checks |
| Diagnostic tests | Battery Test, Cranking Test, and Charging Test |
|---|---|
| Battery measurements | SOH, SOC, CCA |
| Cranking measurements | cranking voltage/time |
| Charging measurements | charging voltage and ripple |
| Display | 2.8" color LCD |
| Cable length | 5.9 ft |
| Dimensions listed | 0.62 x 0.29 x 0.12 inches |
|---|---|
| Weight listed | 1.33 kg |
What to know before buying
Listing details to confirm
For consistent results, select the battery type, test standard, and rated CCA from the battery label, and make secure contact on clean terminals. For in-vehicle tests, switch off accessory loads, turn the ignition off, and close vehicle doors. The listed dimensions and weight may warrant checking before purchase because the dimensions appear unusually small relative to a handheld tester, while the weight is given as 1.33 kg.
What’s in the box
- FOXWELL Battery TesterIncluded
- Storage boxCheck selected pack
Check which accessories are included in your selected pack before buying.
Who is it for?
A good fit for
- DIY vehicle owners who want battery health, cranking, and charging-system checks in one device.
- Mechanics or fleet users working with supported 12V batteries and 12V/24V vehicle systems.
- Owners of vehicles using flooded, AGM, spiral, or GEL batteries.
Less suited to
- Lithium-battery testing.
- Buyers who need a battery charger or OBD2 code scanner.
Customer reviews on Amazon
- 5 stars
76% 76% - 4 stars
14% 14% - 3 stars
2% 2% - 2 stars
3% 3% - 1 star
5% 5%
Customer feedback describes the tester as useful for battery-health readings and reports positive impressions of quality and accuracy. Value for money is mixed, so its appeal may depend on whether the three diagnostic tests and 12V/24V system coverage suit your needs. These comments are customer perceptions, not a verification of measurement accuracy.
Positive themes
- Customers describe it as a good tool for battery-health readings and report positive impressions of quality and accuracy.
Mixed feedback
- Customer feedback on value for money is mixed.
Frequently asked questions
Can the BT705 PLUS test 24V batteries?
The listing specifies 12V battery health testing and 12V/24V cranking and charging-system checks. It does not state that battery health testing itself supports 24V batteries.
Which battery chemistries does it support?
The listing names flooded, AGM, spiral, and GEL batteries, and explicitly excludes lithium.
Does it charge the battery or scan OBD2 codes?
No. The listing describes a diagnostic tester and says it does not charge batteries or function as an OBD2 code scanner.
What should I enter for a battery test?
Use the rated CCA printed on the battery label and select the correct battery type and test standard. The manufacturer also recommends secure clamp contact on clean terminals.
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Offer details
- For in-vehicle checks, switch off accessory loads, turn the ignition off, and close all vehicle doors.
- Repeat comparisons are described as more consistent when battery type, CCA setting, connection point, and battery condition remain the same.