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24V DW-CH03 Charger Operating Instructions (replaces DW0246)
This BatteryShip DW-CH03 Charger is a reliable solution for charging our DW0242/DW0242-HC (24V NIMH, 3.0Ah,
3.3Ah) battery replacements as well as the original Dewalt brand DW0242 (NICD) battery 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 BatteryShip’s generic 100% compatible DW0242/DW0242-HC battery replacements and/or the
original Dewalt brand DW0242 battery 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/DW0242-HC battery into the charger. The light on the charger will turn solid red to indicate
charging. IMPORTANT: If the battery is too warm, the light will turn to a slow red blinking light (temperature
warning). If the battery is more than 112˚ degrees F, the light will turn to a fast red blinking (defective battery
warning). In either case (slow/fast red blinking), please remove the battery from the charger and let the battery
cool for 10-30 minutes before charging again. Fast red blinking occurring on a cool battery means a defective
battery or short circuit was detected.
4. The light on the charger will turn solid green when done. A 3.0Ah NIMH 24V battery can take up to 70
minutes from empty while a 3.3Ah NIMH 24V battery can take up to 80 minutes.
5. Charging ceases 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: To improve the overall life of the charger and
your batteries, remove the battery from the charger and unplug the cord from the wall when the charger is not in
use. Batteries that have been used even once should be fully charged at least every 2 months during storage.
Fast blinking
red light =
defective
battery
Slow blinking
red light =
temperature
warning
Solid green
light =
battery fully
charged
Solid red
light =
battery
charging
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.
Slow
blinking
green light =
no battery
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
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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.
Battery Maintenance
Nickel based batteries (like Dewalt's NICD version and our NIMH version) self-discharge even when
not in use, so we recommend in general to top off the charge on NIMH batteries about once a month
(but in the case of EMS where you may need the max runtime at a moment's notice for an
emergency, then we recommend topping off the battery’s charge daily or as necessary). When using
our 24v DW0242 battery replacement and 24v DW0246 charger replacement, topping off the charge
without fully discharging won't harm the battery, though deep cycling or fully discharging before
charging won't hurt the battery either. 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
Our 24v DW0246 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). Though in the short term, you may miss out on
that extra 10% of performance, 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. Our charger replacement (which only charges to about 90%), therefore helps you extend the
overall life span of the battery which saves you the most money in the long term on batteries. Our
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), our replacement system can yield about 5-10 lifts average per charge
(actual battery performance experienced by individual EMS services may differ greatly due to
variables including environmental factors, patient size, call frequency and ambulance cot condition).
Our 24v replacement for the dewalt/stryker battery (DW0242) and charger (DW0246) is a cost
effective, long lasting (overall life) alternative to both the Dewalt brand system and the Stryker SMRT
system for powering Stryker’s power cots. It has helped hundreds of EMS, Fire, Military and other
groups save hundreds of thousands of dollars over the years while providing more performance
overall than the original Dewalt 24v system did. Some EMS cannot afford Stryker's SMRT system
(which can provide 15-20 lifts per charge in some cases).