My Cart



Model #: TS420

Battery Backup System

18 VDC, 1.0 Ah, Battery module and annunciator, NiMH battery

Manufactured by Mid-Continent Instruments and Avionics for True Blue Power
Customer Rating
Availability List Price
New Outright
No core return required
Quantity Available: Lead times vary. Contact us for current information
or click here for availability of select products.
  • List Price: $3,387.00
Sign In Locate a Dealer
  • Simultaneously provides one primary power output and three lighting power outputs
  • Pitot/Static ports or optional switch input provides ability to work in automatic mode without pilot intervention
    • Arms at beginning of flight
    • Activates instantly upon power loss
    • Recharges during flight
    • Turns off after flight
  • Powers LED or incandescent lighting at 5, 14 or 28 VDC
  • Remote, mini-annunciation switch (with automatic dimming) controls test and manual operations
  • Field replaceable battery module(s)
  • Quality Mil-Spec connectors included
  • Designed and built in Wichita, Kansas, USA
  • One year limited warranty
National Stock Number (NSN)

1.0 Ah (0.05C) at 25° C

Input Power
10 – 32 VDC, 0.25A nominal, 4.0A max
at 14 VDC/2.0A max at 28 VDC

Output Power
18 VDC nominal, 1.6 amps max

3.2 lbs

Dimensions (approx.)
3.35” H x 6.75” L x 3.38” W

Mating Connector
25-pin female D-Sub (MD25F20JVL0 or equivalent)
9-pin female D-Sub (MD9F20JVL0 or equivalent)

Annunciator Lighting
LED backlighting, automatic internal dimming

Battery Charging
Automatic recharging when main power is present

Provides 60 minutes or more of backup power to Mid-Continent’s Electric Attitude Indicator Model 4200 or 4300 and lighting power for two additional instruments (5, 14 or 28V)

Battery run time will vary depending on total power load and battery charge status

FAA TSO-C4c certified
RTCA DO-160E certified
Average Rating:
Rate this product: