HTRC H4AC 20W Compact Balance Charger is the best solution for a 2S-4S Lipo/LiFe/LiHV battery because it is light and exquisite, 20W Max power, 2.0A charge current, AC function, especially there is a separated corresponding balance port for each battery pack. It is very suitable for RC cars and helicopters.

Note: The box image may differ from the actual product.

Connections:

• Firstly, please connect the H4AC  with the power supply, and then the three LED lights will become green, which indicates the charger works in good order.
• Secondly, please connect the 2S-4S Lipo/LiFe/LiHV battery to the balance port, and then select the battery type by pressing the button. If there is any error RED LED will flash.
• To begin the charging long-press the start button and the charging process is started, which is denoted by the blinking of green LED.
• After the Green LED stops blinking, the charging process is finished. Please terminate the charging process.

Warnings:

• Observe any cautions and warnings included with your battery.
• Never leave the charger unsupervised during use. If any malfunction is observed, immediately terminate the process.
• Keep the charger away from moisture, dust, dirt, heat, direct sunlight, and vibration. Do not drop it.
• Double-check all connections prior to starting the charging process. Do not connect with reverse polarity.
• The charger and the battery to be charged should be placed on a heat-resistant, non-flammable, and non-conductive surface. Never place them on a car seat, carpet or similar. Keep flammable and volatile materials well away from the operating area.
• When charging LiPo batteries, we suggest using a LiPo charging safety bag, available from most hobby retailers.
• Never charge a LiPo battery that is swollen in any way.
• To avoid short-circuits between the output power adapter cord input connectors, always connect the adapter cord to the charger first and only then to the battery to be charged. Reverse the sequence when disconnecting.