9 volt battery voltage portable#

There is also a Hybrio NiMH version that has a very low discharge rate (85% of capacity after 1 year of storage). Lithium versions use three 3.2 V cells - there is a rechargeable lithium polymer version. Rechargeable NiCd and NiMH batteries have various numbers of 1.2 volt cells. Very cheap versions may contain only five 1.5 volt cells. Some brands use soldered tabs on the battery, others press foil strips against the ends of the cells.

The exact size of the constituent cells varies from brand to brand - some brands are slightly longer than others - as does the manner in which they are joined together. These are either AAAA cells, or special flat, rectangular cells. Inside a PP3 there are ordinarily six alkaline or carbon-zinc 1.5 volt (nominal) cells arranged in series. The wiring usually uses black and red wires, red for positive, and black for negative. While this is a danger, the same thing can be done with multiple 9 volt batteries to create higher voltage (they can snap together). One problem with this style of connection is that it is very easy to connect two batteries together in a short circuit, which quickly discharges both batteries, generating heat and possibly a fire.

The clips on the 9-volt battery can be used to connect several 9-volt batteries in series. This makes battery polarization obvious since mechanical connection is only possible in one configuration. The power connector has a similar snap fitting on its positive terminal which mates to the battery. The negative terminal is fashioned into a snap fitting which mechanically and electrically connects to a mating terminal on the power connector. The battery has both the positive and negative terminals on one end. It is very widely used in smoke alarms and carbon monoxide alarms and in guitar effects pedals. The Energizer company claims that it introduced this battery type in 1956.

9 volt battery voltage portable#

The PP3 appeared when portable transistorized radio receivers became common, and is still called a 'transistor' battery by some manufacturers. The connectors on the battery are the same as on the connector itself - the smaller one connects to the larger one and vice versa. The connector (snap) consists of two connectors: one smaller circular (male) and one larger, typically either hexagonal or octagonal (female). They are also used as backup power to keep the time in digital clocks and alarm clocks. You can find a battery retailer, who can load-test your battery for you here.9-volt battery showing positive terminal labelĩv batteries are commonly used in smoke detectors, guitar effect units, pocket radios, and radio-controlled vehicle controllers. A load test, not a voltage measurement, is the most-accurate way to determine the health of your car battery. Most auto parts stores offer this service and most will be happy to test it for free. Once you have attempted to fully-charge your battery, you should have it load-tested by a battery professional. OPTIMA Chargers can deliver current to batteries that have been discharged down to 1.25 volts. However, you should know that some chargers will not recognize or charge any battery that has been discharged below a minimum voltage level, sometimes as high at 10.5 volts. If the battery is below 12.6 volts, you should attempt to charge it with a battery charger. If you suspect your battery might have gone bad, measuring voltage is a good first step. While voltmeters can be picked up cheaply at just about any auto parts store and might give you some insight as to what's going on with your battery, it is not a definitive measurement to determine battery health. If these newer cars sit unused for an extended period of time, the battery voltage will probably drop well below that 12.6V threshold. Modern cars are very demanding from an electrical perspective, even when they're not being used. The same is true when measuring battery voltage to determine if a battery has gone bad.įully-charged, most car batteries will measure at least 12.6 volts (~13.0-13.2V for OPTIMA YELLOWTOPs), but low voltage doesn't necessarily equal a bad battery. Sometimes it just means the battery is discharged and needs to be fully-charged with a battery charger. Did you try to start your car and all you heard was a clicking sound? That probably means your battery wasn't charged enough to start your car, but does that mean it is bad? Not necessarily.