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F6DBV > HARDWA 22.01.03 03:01l 44 Lines 1854 Bytes #999 (0) @ WW
BID : 051079F6DBV
Read: DB0FHN GUEST DD3IA
Subj: TH-F6 TH-F7 Battery Charging
Path: DB0FHN<DB0ZWI<DB0HDF<DB0ERF<DB0FBB<DB0GOS<ON0AR<ON0AR<IK1ZNW<ON0BEL<
HA3PG<HA8FY<ON1CED<ON0CK<ON0DOR
Sent: 030121/1034Z @:ON0DOR.#MNS.HT.BEL.EU #:1505 [Dour] FBB7.00 $:051079F6DBV
From: F6DBV@ON0DOR.#MNS.HT.BEL.EU
To : HARDWA@WW
Hello TH-F6 and TH-F7 owners
I read in the instruction manual that the charge must be stopped at full
charge to prevent a too short battery life.
I wonder why ? Because the battery cannot be charged more than 100%
I made some measurements which seem to prove it.
- Under these conditions i wonder how to use this rig when it is mainly
powered by an external 12v power supply ? Must i remove the battery when
it is fully charged ? Or is it advisable to remove the 12v plug and use
the TCVR powered only by its battery but in this case we must charge it
very often, the number of cycle of charge is not infinite and the price of
the battery very high + - 100 US dollars !
I've measured the current flowing at the 12v DC plug connected to a good
external power supply (not the supplied Kenwood charger)
- With a half charged battery and the TCVR turned off the current is
stable at 300 mA, then, just before the end of charge it decreases and
when it reaches about 100 ma the two leds unlight. At this moment the
current continues to decrease and after 15 mn it stay stable at 8 mA only.
- With a continuous current of 8 mA the battery cannot be damaged, more,
if i remove the battery the current is ever at 8 mA so it is not sure at
all that it flows inside the battery itself.
What did you think about that question ?
Best regards from Mike
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$ 73 QRO de Michel F6DBV @ ON0DOR $
$ $
$ Message envoy‚ …: 11:33 Le 21 Jan 2003 $
$ WINPACK 6.51 AGWPE 2000-77 et Modem BAYCOM $
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