ONYX STUDIO 2 (serv.man2) - Harman Kardon Audio Service Manual (repair manual). Page 8

 

Battery<250 mohm 

Output Voltage 

Typical : 3.7V     Limit : 4.2V 

No Load Condition 

Cut Off Voltage 

Typical : 3.0     Limit : 2.6V 

 

Standard Charging 
Method 

0.5C Constant current charge to 4.2V 
(+/- 0.05V), then constant voltage 
4.2V charge till charge current decline 
to <= 0.05C 

 

Charge current @ onyx 
Studio 

Type:800mA 

 

Charging Time @ onyx 
Studio 

5 hours  

 

Maximum Charge 
Current 

 

 

C

0

.

1

Over charge protection 
voltage 

Min. 4.255V Type:4.28V Max 4.305V 

 

Over charge release 
voltage 

Min. 4.03V Type:4.08V Max:4.13V 

 

Over charge protection 
delay time 

Min: 0.96s Type:1.2s Max:1.4s 

 

Over current detection 
voltage 

Min.0.135V Type:0.16V Max:0.185V 

 

Over current protection 
current 

Min 10.05A Type:12.5A Max:15A 

 

Over discharge 
protection delay time 

Min 115ms Type:144ms Max:173ms 

 

Standard Discharge 
Method 

Discharge current of 0.5C with 3.0V 
cut-off after standard charging. 

 

Cycle Life 

Typical : 80% of initial capacity 
Limit :  75% of initial capacity 

Continuous standard charge and discharge 
for 300 cycles.  The capacity is measured at 
the end of 300 cycles 

Capacity Retention 

Typical : 90% of initial capacity 
Limit :  85% of initial capacity 

Fully charge the battery at 23 +/-5°C, then 
stored it at an ambient temperature for 60 
days.  Measured the capacity after 60 days 
storage with 0.5C discharge at 23 +/-5°C as 
retention capacity.  

Continuous Charge 
Test 

No leakage, no visible evidence of 
electrolyte loss, no explosion and no 
fire. 

The battery discharged at 0.5C 23 +/-5°C, 
then fully charged and held at the specified 
end of charge voltage for total period of 30 
days. 

Over Charging 
Discharging 

No leakage, no visible evidence of 
electrolyte loss, no explosion and no 
fire. 

The battery fully charged at 0.5C 23 +/-5°C, 
discharge the battery at constant 0.5C, until 
battery circuit terminates discharge or at 0V, 
then charge the battery with 0.5C until 
battery circuitry terminates charge or at 
4.2V. Repeat the cycle for 30 times. 

Short Circuit 

No explosion, no fire, maximum 
temperature of battery surface should 
not exceed 150°C 

The battery to be fully charged with 
standard charging condition, and short the 
positive and negative terminal with wire