[ILUG-BOM] [OT][CAUTION] Dell Laptop Battery Issue.

[jtd]

On Thursday 17 August 2006 10:58 pm, Rony wrote:

>
> If anyone has any *technical* input regarding this matter then
> post your replies

all chargers are current driven devices. Hence all chargers have 
undervoltage protection by default and over voltage protection as an 
absolute neccessity. So No battery means charger clamps o/p to some 
safe level.  Note some cheap standalone chargers do not have such  
protection and are dangerous. But rest assured that all phones and 
laptops will have these. Many chargers switch the battery voltage to 
a sense ckt, check if it's charged by discharging a little then 
continue charging. Some phones and devices have this built into the 
device / phone and hence can charge from any dc source. Batteries 
also have a thermistor built in to prevent Dell type mishaps.

Rgds
JTD