Page 1: Table Of Contents
MH-C777PLUS-II User’s Manual Thank you for purchasing the Maha MH-C777PLUS-II advanced battery charger and analyzer. Read all directions and safety information before operating this unit. Table of Contents Chapter 1: Precaution & Safety Information P. 2 Chapter 2: Features P. 3 Chapter 3: How to Use a Universal Charger P.
Page 2: Chapter 1: Precaution & Safety Information
To reduce the risk of damage to the AC adapter, pull by the connector rather than the cord when disconnecting.  Use of an attachment not recommended by or sold by Maha may result in a risk of fire, electric shock or injury to persons.
Page 3: Chapter 2: Features
MH-C777PLUS-II User’s Manual Chapter 2: Features  Universal design to accommodate a wide variety of battery packs for two-way radios, cellular phones, camcorders, and more.  Support Lithium Ion (Li-Ion), Lithium Polymer (Li-Po), Nickel Metal Hydride (NiMH), and Nickel Cadmium (NiCD) battery packs.
Page 4 MH-C777PLUS-II User’s Manual Charger Diagram Note: If you are charging individual battery cells such as AA, AAA, C or D batteries, you must obtain an optional “battery holder” and connect it to the external charging connector. An “alligator clip-lead cable” (P/N:...
Page 5: Chapter 3: How To Use A Universal Charger
MH-C777PLUS-II User’s Manual Chapter 3: How to Use a Universal Charger One of the unique features on this charger is its ability to charge a wide array of battery packs regardless of the battery shape. This is made possible by a pair of “floating charging contacts,” pins that can be moved from right to left, and from top to bottom.
Page 6 MH-C777PLUS-II User’s Manual After you have found the right pair of contacts, you must maneuver the “floating charging contacts” on the charger to mate securely with your battery pack. As explained earlier, the floating charging contacts on the charger can be moved to the left or right, top or bottom.
Page 7 MH-C777PLUS-II User’s Manual The charger also features two “positioning guides” as illustrated below. These guides are removable plastic parts designed to guide the battery pack. Depending on the shape of your battery pack, you may need to adjust these positioning guides. For large battery packs, you may need to remove them.
Page 8: Chapter 4: Connecting Power
MH-C777PLUS-II User’s Manual Chapter 4: Connecting Power There are several ways to power the charger:  Using the supplied AC adapter.  Using the supplied cigarette lighter adapter. Note: Before you connect power to the charger, make sure that no battery pack is connected.
Page 9 MH-C777PLUS-II User’s Manual Input Voltage Supported Battery Supported Battery (DC) Voltage for NiMH & Voltage for Li-Ion & NiCD Li-Po 12V / 13.8V 1.2V to 4.8V 3.6V, 7.2V (Standard output for small vehicles) 1.2V to 7.2V 3.6V, 7.2V, 10.8V 1.2V to 14.4V 3.6V, 7.2V, 10.8V,...
Page 10: Chapter 5: Charging A Battery Pack
MH-C777PLUS-II User’s Manual Chapter 5: Charging a Battery Pack Please read Chapter 3 “How to Use a Universal charger” prior to charging a battery pack. Note: the charger has a built-in safety timer that will terminate the charging process automatically after 13 hours of charging regardless of battery condition.
Page 11 MH-C777PLUS-II User’s Manual The LCD screen will also indicate your selection, as shown below: BATT MO DE BATT MO DE QUICK CHARG E QUICK CHARG E Sample readout Sample readout indicating “Ni” indicating “Li” battery mode. battery mode. Install the battery pack on to the charger (refer the Chapter 3 “How to Use a Universal Charger”...
Page 12 MH-C777PLUS-II User’s Manual Place the magnetic temperature sensor on the battery pack. Note: It is important that you place the temperature sensor directly on the batteries if you are charging individual battery cells like AA, AAA, C or D size batteries.
Page 13 MH-C777PLUS-II User’s Manual Note: In certain cases, the charging capacity may appear to be normal (meaning close to the rated capacity) even though the battery doesn’t last very long in your equipment. To determine the actual capacity of the battery pack, you must use the “analyze”...
Page 14 MH-C777PLUS-II User’s Manual Note: At the end of the charge, you might also see the Err3 symbol. This symbol indicates that the charger has properly terminated the charge because the battery pack has reached a preset temperature. This is the equivalence of a full charge. This does not indicate an overcharge and usually does not indicate a problem with the battery pack.
Page 15: Chapter 6: Conditioning & Analyzing A Battery Pack
MH-C777PLUS-II User’s Manual Chapter 6: Conditioning & Analyzing a Battery Pack This charger has the capability to automatically discharge and charge a battery pack, commonly known as the conditioning cycle. When the battery pack becomes fully discharged, the battery capacity will be digitally displayed on the screen.
Page 16 MH-C777PLUS-II User’s Manual Throughout the discharging process, the LCD screen will display various statistics about the charging process. The LCD screen will alternate between “discharging capacity” and “time elapsed” while displaying other information like “battery chemistry”, “charge status”, and “voltage”. The information shown on the LCD during...
Page 17 MH-C777PLUS-II User’s Manual Analyze Function ( Discharge Only Function ) This charger is equipped with a discharge-only, battery capacity analysis function. Unlike the conditioning cycle, it will not charge the battery pack after discharging is completed. This function allows you to obtain the discharged capacity of a battery pack, which is retained on the screen until the button is pressed.
Page 18: Appendix 1: Specification
MH-C777PLUS-II User’s Manual Appendix 1: Specification Detection: Negative Delta V, Zero Delta V, and Max. Temperature Chemistry Lithium Ion, Nickel Metal Hydride, Nickel Supported: Cadmium Voltage 1.2V to 14.4V (1 to 12 cells) for NiMH & NiCD Supported: 3.6V to 14.4V (1 to 4 cells) for Lithium Ion.
Page 19: Appendix 2: Error Codes
MH-C777PLUS-II User’s Manual Appendix 2: Error Codes You may see the following error codes displayed on the LCD screen during charger operation.  Err1: Battery Fault. This generally indicates a reverse polarity. This issue may be resolved by flipping the polarity switch. This is accompanied by continuous beeps.
Page 20: Appendix 3: Contacting Maha
Maha Energy Corp. warrants this product against defects in materials and workmanship as follows: For the first year from the date of purchase, Maha Energy Corp. will repair or replace the unit, at our option, without charge for parts or labor.
Page 21 UPS® Ground service or other carriers at our option. If a faster carrier method is requested, the product owner must pay the cost difference over the UPS® Ground service charge. Maha Energy Corp. is not liable for products lost or damaged during shipment.

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