PowerPlant DE-CH03 User manual

24V DE-CH03 Charger Operating Instructions (replaces DW0246)
This DE-CH03 Charger is a reliable solution for charging the original DW0242 as well as certain generics (24V NICD and
NIMH up to 3.3Ah) via a wall outlet. This charger uses built-in safety features to protect the battery during charging (and
after) from overheating, overcharging, improper voltage, and short-circuiting. This charger considers “full charge” at
90% of battery capacity to protect the battery cells from overcharging.Overcharged battery cells force you to replace
your battery sooner.
WARNINGS: Only charge original DW0242 (or specified generic) batteries with this charger. Do not charge any other
batteries with this charger (this charger does not work with Stryker’s SMRT battery). Do not use the charger in a high
temperature environment (see environment limits at bottom of page). Keep the charger away from rain, water, and any
other liquid. Do not short circuit the battery. Remove the battery from the charger and unplug the adapter from the wall
when not in use.DISCLAIMER: Our guarantee/warranty does not cover any damage caused by improper use.
CHARGING INSTRUCTIONS
1. Assemble charger (if not already) by plugging the wall cord’s small black plastic end into the charger.
2. Plug the wall cord into the wall outlet. The light on the charger will blink slowly green.
3. Slide the DW0242 battery firmly into the charger. The light on the charger will turn solid red to indicate
charging has begun.
•Temperature Warning:If the battery is too cold or too hot, the light will turn to a slow red blinking light (1
blink per second) and charging will stop automatically. In that case (slow red blinking), please remove the
battery from the charger and let the battery cool or warm closer to normal room temperature for 10-30
minutes before charging again.
•Defective Battery Warning: A fast red blinking light (3 blinks per second) means a defective battery or
short circuit was detected on the battery that is currently on the charger. However, this can also occur if
you did not slide the battery fully into the charger (make sure to slide the battery firmly into the charger,
but not too forcefully).
4. The light on the charger will turn solid green when done charging. A 3.3Ah NIMH 24V battery can take up to
80 minutes to charge from empty.
5. Charging stops automatically when fully charged (solid green light) or at a max of 120 minutes (does not
continue nor trickle charge after it has reached full). To reinitiate the charging process, remove the battery for a
few seconds and then slide it back onto the charger (if battery or charger are warm, be sure to allow time for both
to cool before reinitiating the charging process). IMPORTANT: DO NOT leave the battery on the charger after
charging is complete. Remove the battery from the charger and unplug the cord from the wall when the
charger is not in use.If the battery is not used and charged daily, bring to full charge after each use and fully
recharge once per month if not used. See important battery maintenance information on the back side of this
page (batteries damaged by deep discharge are not covered by battery warranty).
Input Voltage: 100-240VAC, 50-60HZ Max Input Current: 1.5A Max Input Power: 97W Charging Voltage: 33V Charging Current: 2.2A
Standby power consumption: <1W Net Weight: 1lb and 3.2oz
Working Environment Limits (During Use): Temperature 0˚to 40˚degrees C, 32˚to 104˚F. Humidity less than 85%. Air Pressure 86Kpa-106Kpa
Storage/Delivery Environment Limits: Temperature -20˚to 65˚degrees (C), -4˚to 149˚(F). Humidity less than 90%. Air Pressure 70Kpa-106Kpa
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Solid green
light =
battery fully
charged
Solid red
light =
battery
charging
Slow
blinking
green light =
no battery
Fast blinking
red light =
defective
battery
Slow blinking
red light =
temperature
warning

Charger Maintenance
This charger was designed to be powered down when not in use to extend the life of the
charger. There is no “off” button, so to power it down you will need to either unplug the charger from
the wall socket or shut off power to the socket/circuit that the charger’s cord is plugged into. Prevent
dust from collecting inside the charger (dust causes overheating), but do not cover charger during
use. Do not leave the battery on the charger after charging is complete (whether or not the charger
is plugged into power) since that can cause deep discharge damage to the battery cells (see below).
Battery Maintenance and Cleaning – BEWARE OF DEEP DISCHARGE!
Nickel based batteries (like Dewalt's NICD version and certain generics NICD/NIMH) self-discharge
even when not in use. When they reach a very low state of charge (deep discharge), the battery cells
can be damaged. This damage is not covered by warranty. To avoid damage, we recommend you
bring the battery to full charge before storing and/or before it sits for any length of time. If you use and
charge the battery daily, you will likely avoid deep discharge damage. If the battery is not used and
charged daily, bring to full charge after each use and fully recharge once per month if not
used.Topping off the battery’s charge without fully discharging will not harm the battery.
Cleaning the battery’s charging contacts may be required when you notice dirt, dust, or residue
buildup (use a Q tip or cotton swab with a small amount of rubbing alcohol to wipe the metal contacts,
then dry the contacts before using the battery again).
Important Differences
This 24v charger replacement stops charging when it senses that all 20 cells of the battery are at
least 90% (or after about 80-120 minutes max). Why? Charging each cell to at least 100% would
consistently bring some cells to well over 100% which actually makes the battery break down (and
need to be replaced) sooner. This charger replacement helps you extend the overall life span of the
battery. This charger will only begin charging the battery again if the outlet loses and then regains
power (or is unplugged from the outlet and then replugged in) or if you remove and reinsert the
battery into the charger. This is different than the Dewalt charger and the Stryker SMRT charger.
Stryker Power Cot Users
Like the Dewalt brand original 24v battery/charger system that Stryker originally shipped with their
cots (before SMRT existed), this replacement system can yield about 5-10 lifts average per charge
(actual battery performance may differ due to environmental factors, patient size, call frequency and
ambulance cot condition).
Wall/Surface Mounting the Charger
As of January 2018, the DE-CH03 comes with mounting holes built in and screws for easy
wall/surface mounting. Choose a safe, cool, and dry location near a power outlet or extension cord,
but clear of other devices on the wall (make sure screws will not penetrate any wiring already in wall).
Using a phillips head screwdriver, screw the 2 included screws into the wall 5 and 1/8th of an inch
apart (1 screw above the other in a straight, vertical line). If center of bottom hole/screw is at the 0
mark on your ruler, then the top screw/hole will sit right between the 5 inch mark and 5 and 1/4th inch
mark. Do not screw them into the wall so far that the charger’s mounting holes cannot grab/sit
securely on the screw heads. Holding charger vertically so that the LED light is at lower left corner,
line up the charger’s built in mounting holes with screws on the wall, then let it sit securely on the
screwheads. This position allows you to slide the battery down onto the charger, then slide it up to
remove (hold charger with other hand while sliding up so that charger does not come off wall).