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MHTX7 User’s Manual 

 

 

 

Xenotronix/TLI  

CAUTION:

   This unit is not short circuit protected - it will deliver the full rated current 

into a short. If the short is not removed, the charger may overheat and be damaged. While 
in a shorted condition the charger will indicate that it is in the charging mode. If the 
charging light is on while not connected to a battery then there is probably a short in the 
output cable or connector. Remove the output cable and see if the charge light goes out 
with the charger plugged back in. If the light stays on without an output cable connected 
then there is a problem with the charger. 
 
Plug the battery charger into a properly grounded (3-prong) wall outlet which supplies 
the correct input power as marked on the unit. The indicators should be dark until a 
battery is attached. 
 
Attach the output connector to the battery connector. The charger should now be on and 
charging the battery. The orange charging indicator should light. If the green ready 
indicator lights instead then the battery voltage may be too high (too many cells). The 
battery must be a 1.2 to 14.4 volts (1 to 12 cells) battery. 
 
The orange charging light indicates that the charger is on and charging the battery. The 
charger will deliver a constant current to the battery for 14 hours. After this time, the unit 
will switch into the ready mode - the charging indicator will darken and the green ready 
indicator will light. At this point the battery is fully charged. When the charger is in the 
ready mode, a low rate constant current (1/4 that of the rated output current) is delivered 
to the battery to keep it fully charged. Most nickel-metal-hydride batteries may be left 
connected to the charger in the ready mode, for some time, without a danger of damaging 
them. However, many manufacturers do not recommend trickle charging their nickel-
metal-hydride batteries. We recommend you refer to the battery manufacturer’s 
documentation for the suitability of trickle charging your battery. 
 
 

CHARGING NOTES AND TIPS 

 
The batteries should be fully discharged before being put onto charge. This has two 
benefits: the batteries will not be overcharged, although it is a fairly benign overcharge, 
and they will be less likely to develop a “memory effect”. 
 
The 

safe charging curve

 graph on the next page represents what size batteries, based on 

voltage and capacity, can be properly charged using this charger. The charger is designed 
to charge batteries at the C/10 charge rate (capacity ÷ 10). If your battery capacity is 2.8 
Ah (2800 mAh) then the charger should be rated for 280 mA (2800 ÷10). Refer to your 
battery documentation to see if the charger is appropriate to charge your battery. 
 
Example: If your charger is rated for 400 mA then it will charge 4 Ah batteries between 
4.8 to 13.2 volts (4 to 11 cells). It will charge a 14.4 volt (12 cells) battery as long as the 
charger receives a full 115 volts ac input. If the input voltage is below 115 volts at that 
charge voltage, the maximum current will begin to drop and the battery may not be fully 
charged. Attempting to charge 4 Ah batteries between 1.2 to 3.6 volts (1 to 3 cells) may 

Summary of Contents for MHTX7 Series

Page 1: ...User s Manual Rev 1 0 October 17 2006 For Sales Support and Service phone 407 331 4793 fax 407 331 4708 website www xenotronix com email information xenotronix com Xenotronix TLI Inc 2541 Tracy Road...

Page 2: ...is Warranty does not apply to and is rendered null and void by any Product which after leaving Seller s manufacturing plant a is repaired or altered without Seller s prior written approval b is the su...

Page 3: ...ery Charger User s Manual Important Safety Instructions 1 Introduction 2 Assembly Instructions 2 Operating Instructions 2 3 Charging Notes and Tips 3 4 Troubleshooting 4 5 Maintenance Instructions 5 B...

Page 4: ...ng off controls may not reduce this risk WARNING o Charge only nickel metal hydride type rechargeable batteries Attempting to charge other types of batteries may result in personal injury and battery...

Page 5: ...olded press on terminal cover If using loose wires insert stripped ends under washers A cable having a shield may be grounded to the bottom hole using a number 6 32 x machine screw OPERATING INSTRUCTI...

Page 6: ...arged When the charger is in the ready mode a low rate constant current 1 4 that of the rated output current is delivered to the battery to keep it fully charged Most nickel metal hydride batteries ma...

Page 7: ...oth dark when power is applied and the charger is properly attached to a battery check to see if the receptacle is controlled by a light switch or power strip It is normal for both indicators to be of...

Page 8: ...nect the battery before attempting any cleaning If it becomes necessary to clean the enclosure wipe the enclosure exterior with a damp cloth If necessary use a mild detergent Do not use an abrasive cl...

Page 9: ...MHTX7 User s Manual Xenotronix TLI 6 DIMENSIONS READY CAUTION CHARGING...

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