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June 20, 2023

7-cell lithium iron phosphate battery pack charger, 1.7A at 22.4 volts, with slow-start function and fuel gauge

 lithium iron phosphate charger catalog
More lithium iron phosphate battery chargers
7-cell Llithium iron phosphate pack charger

This is a charger for 7-series LiFP battery pack, nominally 22.4V (7 x 3.2V), which charge at 25.6 volts (7 x 3.65V). The bulk charge current is 1700 mA. It is a multi-stage Li-iron ferro phosphate LiFePO4 recharger with universal AC input. Includes a slow start feature and a 4-segment fuel gauge.

These are state-of-the-art battery chargers that can be used on-demand, or left permanently on the battery for maintenance. The slow-start function helps battery cycle life, especially with deeply discharged batteries. The charger is fully isolated from the mains, has universal AC input, and a removable AC cord. Will accurately lithium-iron-phosphate packs.


With barrel plug output
barrel connector
7-cell Llithium iron phosphate pack charger $55
barrel connector alligator clip adapter Optional 18" alligator cord adapter $3.25
SDY-C53F (ZHJX002)
adapters with a barrel connector input and screw terminal output
For adapting the barrel connector version to screw terminals $2.50 each

PST-WX12 ---- Output adapter barrel plug kitSee Below $7.00
General Information
Model PST-G100-24F7
Function 22.4V (25.6V) Volt battery charger for Li-iron phosphate 7-cell batteries
Type Battery charger for lithium packs. Can be left on the battery without causing damage, also useful for battery maintainer applications.
Technical Information
Rated input voltage 90-264 VAC, 50/60 Hz
Battery type 22.4V nominal 7-cell LFP battery
Input Frequency 50-60 Hz
Battery voltage 22.4 volts nominal
Battery size 3 AH to 30+ AH packs
Charger type Constant Current/ Constant Voltage precision charger
Charging current 1.7Amps or 1700mA peak charge
Charging algorithm
This is the "European" charge algorithm that does not float charge the battery at the last stage, but still keeps it maintained. (see the graph below)
Constant current/constant voltage
Stage 1 slow start, pre-charge function for deeply discharged packs
Stage 2 bulk charge stage. 1.7 amps is applied to the battery until the voltage rises to 25.6 volts
Stage 4 constant voltage state until the charge current falls to 400mA
Stage 5. The charger turns off.
Style Set top
Output power 36 W peak
Output voltage 25.6 volts maximum during charge
Size 170 X 71 X 51 mm, 6.7 x 2.75 x 2.0 inches
Weight 400 grams, 0.9 lbs, 14 oz.
Environment -20°C to +50°C operating, -40°C to +70°C storage
Vibration, Impact 5mm, 50Hz, 600 Seconds, 1 meter drop 3 times
Output options included 5.5 mm OD x 2.1 mm ID barrel, center positive More barrel connector adapters available separately, see below
Safety TUV, CE marked, designed to EN60950, GB4946, UL1950, certified and marked TUV
Protections Over Voltage Protection, Output current protection, reverse polarity protection (auto-clearing), short circuit protection (auto-clearing)
Efficiency >80%
HiPot, ESD Hi-Pot 3000 V, 1 minute, ESD 8000V
MTBF 30,000 hours by MIL-STD calculation
Cooling Natural convection, no fan
LED Indications   Power on, but no battery connected Power LED red
Slow start The lowest green light is the only one on.
Charging Charging lights lit to show the state of charge
Charged All four green LEDs are on
Reverse polarity, or shorted output All lamps flash
No battery connected Red light is on, but no green LEDs
Power light slowly pulsing The battery voltage is higher than the charge voltage
User's manual Click here for user's manual  
Twelve optional DC Plugs slip over the 5.5 x 2.1 mm connector if desired.
  • 2.35 OD x 0.7 ID Barrel
  • 3.0 OD x 1.1 ID Barrel
  • 3.5 OD x 1.35 ID Barrel
  • 4.0 OD x 1.7 ID Barrel
  • 4.75 mm OD x 1.75 mm ID Barrel EIAJ-03
  • 5.0 mm OD x 3.5 mm ID with center pin
  • 5.5 mm OD x 1.5 mm ID type 2 Barrel
  • 5.5 mm OD x 2.5 mm ID Barrel
  • 6.3 OD x 3.0 ID center pin Barrel
  • 6.0 OD x 4.4 ID center pin Barrel
  • 7.4 mm OD x 5.0 center pin ID Barrel
  • 7.9 OD x 5.6 ID center pin Barrel


OEM Battery Chargers Much lighter and smaller than transformer based lithium iron phosphate chargers

OEM Power Supplies Universal Power Input

Universal Power Input OEM Power Supplies and OEM Battery Chargers Available now

LIFP battery charger, 7-cell pack battery chargers

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