- January 20, 2021, 11:10 AM True Blue Power has unveiled two intelligent battery chargers—the True Blue Charger Pro and True Blue Charger Mx—that it claims will simplify the charging of lithium-ion aircraft batteries. The company specifically designed the TT28-12 Charger Pro to charge, discharge, and test True Blue Power li-ion aircraft batteries and pre-loaded it with all necessary parameters, allowing maintenance personnel to top charge batteries and perform scheduled capacity checks. It also automatically discharges li-ion aircraft batteries to 30 percent state-of-charge, which is required for air shipment. Meanwhile, the TT28-2 Charger Mx maintains li-ion and sealed lead-acid aircraft batteries of any capacity, while continuously displaying battery voltage. The direct-connect, 2.5-amp charger extends battery life and can be used for standby maintenance without trickle charging.