I have become confused regarding some of the info in these threads.
My C860 is working & charging without problems. The attachment is of screen shots from D+M mode after the charging light had gone out (ie: fully charged). They are:
- Service Menu pg (2/3)
- line 5 - Low Battery
- line 6 - Batt Voltage Adjust
- 6.1 - Battery Voltage Adj.
- & 6.2 - Battery Voltage Check.
OMICRON. You can include these with your How-To, if you like.OK, first "2.5" (Low Battery Check) still shows Main Battery Status as "L", despite the full charge.
Next, at the bottom, "Main Bat" is 4.1V (218) & "Thrmo" is 1.4V (110). Thrmo probably refers to the thermistor reading between the (-) & (T) battery terminals, but I do not know how to interpret the values shown.
Going to "2.6.1" (Battery Voltage Adjustment), Main Bat AD (Analog - Digital??) is (218), the same value given above in "2.5". Although this is a fully charge & functional C860, the Flash Data is ----!
This appears to contradict the theory that there must be a threshold stored in Flash Data in order for the C860 to charge its battery correctly.
Feeback, please? Then, in "2.6.2" (Battery Voltage Check), Main Bat AD is 218 BUT followed by the infamous (2.8V). Flash Data, delta & ADJUST AD are all ----. And notice there are TWO lines for ADJUST AD.
So, a fully charged C860 shows the 2.8V mentioned in other posts.
The same C860 & battery pack, at approximately 1/2 charge remaining, gave:
2.5
Status: L
Main 3.8V (191) & Thrmo 1.4V (115)
2.6.1
Main AD 192
Flash ----
2.6.2
Main AD 192 (2.4V)
Dlash, delta & ADJ AD all ----
In the Panasonic Li-Ion White Paper at:
Panasonicunder
"The Functions of the Safety Circuits (Typical Functions)"
it says -
1. The Overcharge Safety Function
The charge stops when the voltage per cell rises above 4.30 ± 0.05 V.
The charge restarts when the voltage per cell falls below 4.00 ± 0.15 V.
2. The Overdischarge Safety Function
The discharge stops when the voltage per cell falls below 2.3 ± 0.1 V.
The discharge restarts when the voltage per cell rises above 3.0 ± 0.15 V.
And in the "FLOWCHART FOR CHARGING LITHIUM ION BATTERY PACKS", immediately after the decision branch:
( OCV<4.2V? )
Is voltage check 1 (no load) higher than the charge completion voltage? (4.2 V) where OCV is "Battery Pack load open Voltage".
(NO) ---> "Overcharge error"
(YES) --> the next decision branch:
( OCV>2.9V? )
Voltage check 2 (no load)
(NO) ---> "0.1 CmA Charge rate"
(YES) --> "0.7 CmA Charge rate"
If "0.1 CmA Charge rate" is the branch, the flow chart next shows a decision point "Overdischarge check"
( OCV voltage > 3V? )
(NO) ---> checks the Recharge timer and either goes to "Timeout Error" or branches back up to (A) immediately after the "Battery pack insertion check".
(YES) --> branches back up to (A) immediately after the "Battery pack insertion check" and reenters the flowchart there.
The notes for this section include:
(4) Low-Voltage Battery Pack Charge
When the voltage per cell is 2.9 V or less, charge using a charge current of 0.1 CmA or less.
Bearing in mind that, at the start of the paper, Panasonic cautions:
"The voltages listed below are typical values and are not guaranteed. The charge voltage varies according to model number."
the only reason that I can see so far for the 2.8V in (2.6.2) is that this is Sharp's value for the Low Voltage Charging cut off level.
Feeback, please? Recap:
For a fully charge & functional C860:
(2.5) Main Battery Status is "L"
(2.6.1) & (2.6.2) Flash Data is ----
(2.6.2) Main Bat AD is the same as elsewhere BUT followed (2.8V).
NOT trying to be contentious, a "know it all" or to shoot anyone down, rather just that I am having trouble reconciling these data with several hypothesis put forward in these threads.
Geek minds *gotta* KNOW! (G)
