Foxwell BT780 vs Topdon BT300P

Last updated: November 9, 2026

The Topdon BT300P is the better car battery tester overall, rated 3.7 to 3.4. The Topdon BT300P leads on price. The Topdon BT300P costs $120 less ($99.99 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 vs Topdon BT300P

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every with printer car battery tester; a clear win is highlighted. How we rank explains each one.

Factor weightTopdon BT300PFoxwell BT780
Overall rating3.7/53.4/5
Price 25%70 $99.9936 $219.99
Battery coverage 25%80 up to 2,000 CCA, 24 V systems80 up to 2,000 CCA, 24 V systems
System tests 20%80 tests the starter, charging system80 tests the starter, charging system
Features or load 20%40 built-in printer, color or phone screen45 built-in printer, own battery, cable of 5 ft or more
Warranty 10%0 warranty not published, scored as none0 warranty not published, scored as none

Specifications

Topdon BT300PFoxwell BT780
Testing
TypeConductance (digital)Conductance (digital)
Battery voltages12 V-
System voltages12/24 V12/24 V
Rating range100-2,000 CCA100-2,000 CCA
Battery typesFlooded, AGM flat plate, AGM spiral, gel, EFBFlooded, AGM flat plate, AGM spiral, EFB, gel, start-stop
Lithium batteries-No
Rating standards-CCA, CA, MCA, JIS, DIN, IEC, EN, SAE
Starter testYesYes
Charging system testYesYes
Features
Display2.4 in color LCD3.2 in LCD
Built-in printerYesYes
Own battery-Yes
Cable length2.6 ft6.5 ft

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