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True Blue Power® products are sold to qualified avionics/instrument shops, FAA repair stations, fixed base operators (FBOs) and original equipment manufacturers (OEMs).

True Blue Power is a division of Mid-Continent Instrument Co., Inc. True Blue Power products can be purchased through Mid-Continent’s online shopping tool at www.mcico.com. Click continue to be directed to the mcico.com purchasing page.

If you are not a business, please contact your local avionics dealer and ask for a True Blue Power product.




Battery Tester and Charger

The TT43 performs automatic capacity testing and recharges batteries in five hours or less. It features a dot matrix LCD display and microprocessor control to provide test status information and accurate results. The TT43 is able to test and charge two batteries at once. Buy Now


  • Tests and charges the removeable battery of the 4300 Series and TS420 Series Emergency Power Supply
  • Alphanumeric dot matrix LCD display provides dynamic test status and measurements
  • Test/Charge one or two batteries simultaneously in less than 5 hours
  • Microprocessor control adjusts test to accurately compensate for acceptable battery variation
  • Bright LEDs provide quick reference pass/fail results
  • Can float charge batteries indefinitely to maintain an always-ready state
  • Designed and built in Wichita, Kansas, USA
  • Two-year limited warranty


Model Number TT43
Part Number 6430043-1
National Stock Number (NSN) 6130-01-641-8265
Power Supply Wall-outlet AC Adapter included
Battery Type Switch allows for selection of 0.5Ah or 2.5Ah battery
Battery Detection Load sensing recognizes batteries when connected to the tester
Protection Short-circuit protection and time out for failed batteries


Product Flier

Installation Manual
IM 9017682

Technical Drawing
OL 6430043