MFJ MFJ-641Y2, MFJ-641Y3, MFJ-641Y4 User Manual

MFJ-641

MFJ Rapid Battery Charger Instructions

Thank you for purchasing our Battery Charger. Please read the following information carefully before
using the charger.

INTRODUCTION:

The MFJ-641 is a battery charger with both quick and trickle charging for Ni-Cd and Ni-MH battery packs.
It uses a microprocessor and the -∆V principle to examine whether the battery is fully charged, thus
overcharging can be avoided and the life of the battery can be prolonged.

OPERATION:

1. Connect the power source to the charger. The POWER INDICATOR lights up. This indicates a
READY status. The charger is now ready for use.

2. Insert the battery pack into the charging slot. The CHARGING INDICATOR lights up. The charger
proceeds to a quick charging status. When the battery pack is fully charged, the CHARGING
INDICATOR will start to flash. The charger then proceeds to a trickle charging status.

3. When the CHARGING INDICATOR starts to flash, the battery pack is fully charged and can be
removed. If the battery pack is left in the charger, the charger will continue to charge the b attery in
trickle charge mode. Although it is all right to leave the battery in the charger for trickle charging,
continuous charging over 24 hours must be avoided. The trickle charging current is 0.1 X rated
current of the battery pack.

4. If the CHARGING INDICATOR does not light up when the battery pack is inserted into the charging
slot, it may indicate that you have a bad battery or the battery pack is not the right one for the Charging
Slot. Please check the battery before re-inserting.

CAUTION:

1. Before charging, please make sure that the charging slot can be used for your battery pack (Please see
Chart 1 for the battery packs each charging slot can accommodate). WARNING! Placing the wrong
battery pack in the wrong charging slot can damage the charger.

2. Please be sure that the battery is totally depleted of charge before charging, otherwise MEMORY
EFFECT will affect the life of the battery.

CHART 1

CHARGING SLOT CHARGED BATTERY PACK

10-BCI-2 ICOM BP-131, 132

10-BCI-3 ICOM BP-171, 172, 173
10-BCY-2 YAESU FNB-10, 11, 12, 17, 27
10-BCY-3 YAESU FNB-31, 38
10-BCY-4 YAESU FNB-40, 41, V47, (V)49

SPECIFICATIONS:

CHARGING SLOT INPUT VOLTAGE QUICK CHARGING CURRENT

10-BCI-2 DC 18 V 7.2V 600mA 12V 600mA

10-BCI-3 DC 18 V 7.2V 600mA 9.6V 600mA
10-BCY-2 DC 18 V 7.2V 600mA 12V 600mA
10-BCY-3 DC 18 V 4.8 V 600mA 9.6V 600mA
10-BCY-4 DC 18 V 6V, 9.6V, 12V 800mA

FULL 12 MONTH WARRANTY

MFJ Enterprises, Inc. Warrants to the original owner of this product, if manufactured by MFJ Enterprises,
Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects
in material and workmanship for a period of 12 months from date of purchase provided the following terms
of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit card or
money order receipt, etc.) describing the product to establish the validity of the warranty claim
and submit the original of machine reproduction or such proof-of-purchase to MFJ Enterprises,
Inc. at the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny
warranty without dated proof-of-purchase. Any evidence of alteration, erasure, or forgery shall
be cause to void any and all warranty terms immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to the original
owner any defective product under warranty, provided the product is returned postage prepaid to
MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $7.00 covering
postage and handling.

3. MFJ Enterprises, Inc. will supply replacement parts free of charge for any MFJ product under
warranty upon request. A dated proof-of-purchase and a $5.00 personal check, cashiers check, or
money order must be provided to cover postage and handling.

4. This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling [phone].

5. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.

6. Wired and tested PC board products are covered by this warranty provided on the wired and
tested PC board product is returned. Wired and tested PC boards installed in the owner’s cabinet
or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at
the owner’s expense unrepaired.

7. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to person or
property by the use of any MFJ products.

8. Out-of-warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product provided
the unit is shipped prepaid. All repaired units will be shipp ed COD to the owner. Repair
charges will be added to the COD fee unless other arrangements are made.

9. This warranty is given in lieu of any other warranty expressed or implied.

10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the products
previously manufactured.

11. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed to MFJ
Enterprises, Inc., 300 Industrial Park Road, Starkville, Mississippi 39759, USA and must be
accompanied by a letter describing the problem in detail along with a copy of your dated proof­ of-purchase.

12. This warranty gives you specific rights, and you may also have other rights which vary from state
to state.