Many registered nurses (RNs) and licensed practical nurses (LPNs) are finding the education and support they need to reenter nursing by enrolling in a refresher program. Offered through colleges and hospitals, nurse refresher programs are designed for RNs and LPNs who have been out of the field for at least three years. Whether your current nursing license is inactive or lapsed, your state board of nursing requires you to take a nurse refresher course to return to active status.
How to charge a battery. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it delivers 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours and so on.
If a battery is said to have 20 amp-hours of capacity, it means that it can hypothetically discharge one amp of current for 20 hours, 20 amps for one hour, or any combination of amps and hours that equal 20 amp-hours. That might be five amps for four hours, 10 amps for two hours, or 6.66 amps for three hours. In theory, you can calculate the run-time for any of your battery's accessories by dividing the amp-hour rating of the battery by the amp draw of the accessory. You might have to convert from watts first. For instance, if you want to know how long you can bang a 1,000-watt stereo system on a heavy-duty 100-amp-hour battery, start by dividing the wattage by the voltage -- 12 volts, in this case -- to arrive at an 83.3-amp draw for the stereo system.