How you adjust the time and date?

Good day, Sorry for the late reply because Chinese New Year holiday. Here is the video, please note to hold left key, down key and the menu key to change the date. Anything else we could help, please contact us via Amazon messages. Stay healthy. Mesue

Does this bt780 battery tester need the voltage higher than 9V to run the printer?

No it has a 9 volt battery in it as well so as long as that battery is good the voltage of the cars battery doesn’t matter

How to update the software of this BT780 battery tester?

Hello Dear, Thanks for your inquiry. Here are the steps about how to update this BT780 battery tester: 1. Power on the battery tester and find FORMAT CARD on the main menu. 2. Remove TF card from the tester and connect it to computer via card reader in the case. 3. Download BT780_Firmware_V... from Foxwell website(old and new are all allowed). 4. Put TF card back to the analyzer, and select FIRWARE UPDATE from the Main menu. 5. Input 1234 and click Enter button. After the tester restart automatically, the software is updated successfully. If you have any other questions, pls feel free to contact us directly below. Best wishes, OBDZON amazonsupport@foxwelltech.com

Is there U.S. based support?

Hi Wayne C., thanks for your inquiry. Yes, usually Foxwell BT780 car battery tester supports U.S. Any other questions, please feel free to contact us for further assistance. :) May you and your family safe and healthy! OBDZON Link to contact us: https://amzn.to/3poRTiH Email: amazonsupport@foxwelltech.com

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Description

🔧 Never get stranded again—test, print, and trust your battery status like a pro!

INSTANT PRINTED REPORTS - Print detailed battery health & charging system results on the spot—no subscriptions or extra fees.
SELF POWERED INDEPENDENCE - Runs on internal battery for off-grid testing—perfect for mobile mechanics and fleet managers.
MULTI USER CUSTOM REPORTS - Supports 4 user profiles with personalized shop/technician branding for professional record-keeping.
RUGGED WEATHERPROOF DESIGN - Built tough with 6.5-ft leads and reverse-polarity protection, working flawlessly from freezing cold to scorching heat.
PRO LEVEL BATTERY DIAGNOSTICS - Accurately test 12V & 24V batteries with 99.9% precision for cars, trucks, boats & more.

The FOXWELL BT780 is a professional-grade 12V/24V car battery and charging system tester featuring advanced conductance technology, a built-in thermal printer, and multi-user support. It delivers ultra-accurate diagnostics across multiple battery types and vehicle classes, operates independently with its own battery, and withstands extreme temperatures, making it an essential tool for workshops, fleet maintenance, and mobile technicians.

Specifications

Manufacturer	foxwell
Part number	foxwell bt780
Item Weight	454 g
Package Dimensions	36.91 x 27.41 x 8.61 cm; 453.59 g
Item model number	Foxwell BT780 Digital Battery Analyzer
Size	foxwell 12v/24v battery analyzer BT780
Color	Foxwell BT780 12v/24v Battery Tester
Style	6V 12V 24V Battery Tester with Printer For Car Heavy Duty Truck Buses Marine Motorcycle ATV SUV Boat Yacht Golf Carts
Power source type	Built-in Printer; Battery Health & Cranking & Charging Test
Voltage	12 Volts
Item Package Quantity	1
Measurement Accuracy	0.5
Special Features	1. Replaceable test lines, <br>10. Advanced starter/alternator test, <br>11. Quick starter analysis without disabling the ignition, <br>12. Multilingual menu and test results-Chinese, Dutch, English, French, German, Hungarian, Japanese, Korean, Polish, Portuguese, Russian and Spanish, <br>13. Dedicatedly developed to test start-stop AGM and EFB batteries, and equipped with 0-1000A AC and DC current clamp(optional), <br>14. Does not emit light, heat or spark, or discharge battery battery - keeps operation safe for all levels of users, <br>2. Advanced conductance test technology makes test more convenient and accurate, <br>3. Ripple voltage test allows the technicians to check the output voltage of alternator quickly, <br>4. Built -in thermal printer makes it possible for the technicians to print test results at anytime and anywhere, <br>5. SOC and SOH test result display makes technicians easier and faster to judge the battery status, <br>6. Tests multiple battery types - regular flooded, AGM flat plate, AGM spiral and gel, start-stop AGM and EFP batteries, <br>7. Tests multiple rating systems - CCA, BCI, MCA, JIS, DIN, IEC, EN, SAE, <br>8. Quick and accurate test result display in just 3 seconds, <br>9. Applicable for 12V battery system and 12V & 24V starting and charging system
Included components	battery tester
Batteries Included?	No
Batteries Required?	No

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