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NeedMoCoffee | Staff 7.1K Views
Nov 6, 2026 10:24 AM

TopDiag T300PRO 3-in-1 OBD2 Scanner & Battery Tester

$25

$45

44% off
+ Free S&Hat Amazon
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Deal Details
Topdiag Online via Amazon has TopDiag T300PRO 3-in-1 OBD2 Scanner & Battery Tester w/ Cranking Test (Red) on sale for $44.99 - $20 when you "clip" the coupon on the product page = $24.99. Shipping is free.

Thanks to Deal Hunter NeedMoCoffee for sharing this deal.

Note: You must be logged in to clip coupons; coupons are typically one-time use and availability may vary by account.

Product Details:
  • 3-in-1 Tool: OBD2 Code Reader, 12V Battery Analyzer & 16-Pin ECU Breakout Tester
  • Reads and Clears Engine Fault Codes with Built-In Database of 30,000+ DTCs
  • Full OBD2 Diagnostics: Live Data, Freeze Frame, I/M Readiness, O2 Sensor Test, EVAP Test, VIN Lookup & MIL Status
  • ECU Breakout Testing for Communication Faults, Wiring Issues & OBD2 Port Power Problems
  • 6-Mode 12V Battery Testing: SOH, SOC, CCA, Internal Resistance, Starter Cranking & Alternator Charging
  • Compatible with 12V Flooded, AGM, EFB & GEL Lead-Acid Batteries
  • I/M Readiness Monitoring for Emissions and Smog Test Preparation
  • 2.8" TFT Color Display with Real-Time Data Graphing
  • Live Data Recording & Playback for Troubleshooting
  • Plug-and-Play Design; No Batteries or Apps Required
  • Compatible with OBD2 Gasoline Vehicles: 1996+ US, 2001+ European & 2008+ Asian Models
  • Supports 12V Motorcycle Battery Testing
  • Supports Major OBD2 Protocols: ISO 9141-2, ISO 14230-4, ISO 15765-4, SAE J1850 PWM & VPW
  • User-Friendly Interface with Multilingual Support

Editor's Notes

Written by Nate650 | Staff

Original Post

Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Topdiag Online via Amazon has TopDiag T300PRO 3-in-1 OBD2 Scanner & Battery Tester w/ Cranking Test (Red) on sale for $44.99 - $20 when you "clip" the coupon on the product page = $24.99. Shipping is free.

Thanks to Deal Hunter NeedMoCoffee for sharing this deal.

Note: You must be logged in to clip coupons; coupons are typically one-time use and availability may vary by account.

Product Details:
  • 3-in-1 Tool: OBD2 Code Reader, 12V Battery Analyzer & 16-Pin ECU Breakout Tester
  • Reads and Clears Engine Fault Codes with Built-In Database of 30,000+ DTCs
  • Full OBD2 Diagnostics: Live Data, Freeze Frame, I/M Readiness, O2 Sensor Test, EVAP Test, VIN Lookup & MIL Status
  • ECU Breakout Testing for Communication Faults, Wiring Issues & OBD2 Port Power Problems
  • 6-Mode 12V Battery Testing: SOH, SOC, CCA, Internal Resistance, Starter Cranking & Alternator Charging
  • Compatible with 12V Flooded, AGM, EFB & GEL Lead-Acid Batteries
  • I/M Readiness Monitoring for Emissions and Smog Test Preparation
  • 2.8" TFT Color Display with Real-Time Data Graphing
  • Live Data Recording & Playback for Troubleshooting
  • Plug-and-Play Design; No Batteries or Apps Required
  • Compatible with OBD2 Gasoline Vehicles: 1996+ US, 2001+ European & 2008+ Asian Models
  • Supports 12V Motorcycle Battery Testing
  • Supports Major OBD2 Protocols: ISO 9141-2, ISO 14230-4, ISO 15765-4, SAE J1850 PWM & VPW
  • User-Friendly Interface with Multilingual Support

Editor's Notes

Written by Nate650 | Staff

Original Post

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7 Comments

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Nov 6, 2026 10:32 AM
114 Comments
Joined Dec 2019
HonestBanana2312Nov 6, 2026 10:32 AM
114 Comments
Seems like a good deal for the battery tester feature alone. The CCA test is a way better test than just look at voltage with a multimeter
Nov 6, 2026 1:44 PM
160 Comments
Joined Nov 2011
badman9Nov 6, 2026 1:44 PM
160 Comments
Not a topdon i dont think, but still a decent deal for the price
1
Nov 6, 2026 3:17 PM
1.6K Comments
Joined Mar 2008
gemniii42Nov 6, 2026 3:17 PM
1.6K Comments
It's Topdiag T300PRO NOT TOPDON! the TOPDON BT300 goes for about $100 and has a built in printer.
Last edited by gemniii42 November 6, 2026 at 08:25 AM.
1
Nov 6, 2026 3:42 PM
167 Comments
Joined Nov 2016
ChaleposNov 6, 2026 3:42 PM
167 Comments
Quote from gemniii42 View quoted comment :
It's Topdiag T300PRO NOT TOPDON! the TOPDON BT300 goes for about $100 and has a built in printer.
Yup, title is misleading.
Original Poster
Pro
Deal Hunter
Nov 6, 2026 4:39 PM
14K Comments
Joined Jun 2020
NeedMoCoffeeNov 6, 2026 4:39 PM
Original Poster
Pro
Deal Hunter
14K Comments
Facepalm Thanks for the correct everyone. Not really sure where that Topdon came from. I'd blame it on autocorrect but I don't really think my laptop does that so that one is all me. Fixed.
Last edited by NeedMoCoffee November 6, 2026 at 09:45 AM.
Nov 6, 2026 8:58 PM
1.2K Comments
Joined Jul 2015
TheDirtCheapNov 6, 2026 8:58 PM
1.2K Comments
Quote from badman9 View quoted comment :
Not a topdon i dont think, but still a decent deal for the price
There is one on sale right now though!!! It's 21% off too.https://a.co/d/0ijdfmlk
Nov 7, 2026 3:21 AM
62 Comments
Joined Apr 2008
CaptAmerica72Nov 7, 2026 3:21 AM
62 Comments
Deal is Dead

It's alive again.
Last edited by CaptAmerica72 November 7, 2026 at 11:03 AM.
1

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