Charger with lower voltage

T

Taxup2011-03-26 08:56:33

Charger

Taxup, 2011-03-26 08:56:33

What will happen if you charge the device not with a native one (burned out), but with another charger, but whose voltage will be less than that of the native one, at the same current strength?

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8 answer(s)

A

Artyom, 2011-03-26
@tormich

How much lower the voltage is, if the battery is rated at 3.7V, then its full charge is 4.2-4.4V. Charging for such a battery basically gives out about 7-9V. Again, depends on the manufacturer. I think if the charging voltage is 30% more than on a charged battery, nothing bad will happen. If undercharging is less possible, the result is a decrease in autonomy.

S

Sergey Lerg, 2011-03-26
@Lerg

Depends on the device. If there is a special charge circuit, then if the voltage is less than some threshold, the charge will not go.
By amperage do you mean the maximum amperage for the charger? In this case, if more, then it will not be worse, the device itself sets the current strength, since it depends on the load.
If the charger is connected directly to the battery, then a lower voltage corresponds to a longer charge and possibly an incomplete charge.
In practice, in some cases it is possible to apply a lower charge voltage, but it all depends on the device itself. Yes, and the charger itself can be tricky, for example, like laptop power supplies.

A

Artyom, 2011-03-26
@tormich

Give the characteristics of the devices. And models.

S

Sergey Lerg, 2011-03-26
@Lerg

For such a device, no, you need exactly 9 volts. The current strength can be 2A, I think.

T

Taxup, 2011-03-26
@Taxup

Can anyone suggest an online store with such a device? I did not find it on dealextreme.

A

Artyom, 2011-03-26
@tormich

I think on any radio market you can buy a device with similar characteristics. If you haven't found it, here's a link to ebay with delivery to Kazakhstan for about $7. Of course you need to solder the cable.

M

mambet, 2011-03-26
@mambet

It all depends on the scheme used in a particular device.
My old IBM laptop, which regularly uses 16 volt charging, was charged from both 12 volts and 19 volts. And for a long time - and nothing burned out. If only the charging itself could withstand the required amperes.