nifty Mk 3 Seies Operating/Safety Instructions Manual page 37

The charger requires a minimum battery voltage of 1.5 volts per battery (overall for two batteries 3
volts, for 4 batteries 6 volts for 8 batteries 12 volts and 18V for 72V). If the voltage is below these
values then the charger will not function (Charger will not detect batteries to begin charge.) If the
batteries have fallen to such a poor state they will have to be removed from the machine and charged
individually with an independent charger until the optimum voltage has been reached. This is best
performed at very low currents to 'recover' the batteries if sulphation has already started i.e. a 'trickle'
charger. This can take several hours, possibly days. Careful monitoring of the rise of battery voltage
will indicate when recovery has been achieved.
TOPPING UP
During the course of normal operation, the batteries should be inspected at least once a fortnight to
check the level of electrolyte. During the end of charge, gassing takes place, which will cause a slight
reduction in the volume of acid in the battery. This can be topped up with de-ionised water as required.
During this inspection, it is useful to note any imbalance in the fluid levels. One indication of a faulty
cell would be an increase in the loss of battery acid, which would then require more frequent topping
up on that cell, or cells. Faulty cells can liberate excess hydrogen, even during normal operation, with
the resulting risk of explosion if ignited. Any faulty batteries should be replaced as soon as
possible with an equivalent sized and rated unit.
Note: BATTERIES CONTAIN ACID; therefore, protective safety glasses and gloves (Appropriate
PPE) MUST be worn whilst performing these checks.
English/USA – 05/15
Original instructions
Height Rider/SP Series
Operating & Safety Instructions
35