More about battery (489)

1-12-2002 | This circuit, which is designed for use with 6-V rechargeable batteries, provides automatic switchover to a reserve battery when the voltage...

1-07-2002 | Here we have yet another excellent universal battery charger that is easy to build and can be used to safely charge practically all commonly...

1-07-2002 | In many small battery powered apparatus it is common to have an LED act as a combined indicator for ‘power-on’ and ‘battery state’. The most...

1-12-2001 | This battery cooler is used to cool and discharge lead-acid battery packs found in model planes, boats and cars, so that they can then be sa...

1-12-2001 | To enable the control module, described in Part 1, to function as a battery discharger, a number of additional hardware components are requi...

1-12-2001 | With a suitable load, the terminal voltage of a NiCd or lithium-ion battery is proportional to the amount of stored energy. This relationshi...

1-11-2001 | This circuit can measure the capacity of individual cells as well as battery packs with an open circuit voltage of up to 35 V. The only requ...

1-11-2001 | Notebook PCs are great but stray too far from a source of power and it’s not long before low-battery warnings start to appear. Mains adapter...

1-09-2001 | This circuit makes it possible to do something that was previously unthinkable: reversing the effects of sulphation in tired lead-acid batte...

1-07-2001 | More and more electronic devices are portable and run off batteries. It is no surprise, then, that so many flat batteries find their way int...