Calculating charge times, Chart Method

Calculating charge times

The Chart Method

Use the following table to more accurately determine the time it will take to bring a battery to full charge. First, identify where your battery fits into the chart.

•Small batteries — motorcycles, garden tractors, etc.

— are usually rated in Ampere Hours (AH). For example: 6, 12, 32 AH etc.

•Batteries in cars and smaller trucks are usually rated in Reserve Capacity (RC), Cold-Cranking Amps (CCA), or both.

•Marine, or deep-cycle batteries are usually rated in Reserve Capacity (RC).

•NR means that the charger setting is NOT RECOM-

MENDED.

Find your battery’s rating on the chart below and note the charge time given for each charger setting. The times given are for batteries with a 50-percent charge prior to recharging. Add more time for severely dis- charged batteries.

	BATTERY SIZE/RATING					CHARGE RATE/CHARGING TIME - HOURS
	BATTERY SIZE/RATING					2 AMP		20 AMP	60 AMP
						2 AMP		20 AMP	60 AMP
SMALL		Motorcycle, garden		6	- 12 AH	2	- 4	NR	NR
BATTERIES		tractor, etc.		12	- 32 AH	4 - 10		NR	NR
		200	- 315 CCA	40	- 60 RC	11	- 14	1 - 1½	3/8 - ½
CAR/TRUCKS		315	- 550 CCA	60	- 85 RC	14	- 18	1½ - 2	½ - 5/8
		550	- 1000 CCA	85	-190 RC	18	- 35	2 - 3½	5/8 - 1
MARINE/DEEP CYCLE				80 RC		18		1¾	NR
MARINE/DEEP CYCLE				140 RC		27		2¾	NR
				140 RC		27		2¾	NR
				160 RC		30		3	NR

				180 RC		33		3½	NR

The Hydrometer or Electronic Method

To find the time needed to fully charge your battery, determine the battery’s charge level with a hydrometer or electronic Percent-of-Charge Tester. The following table will help you convert hydrometer readings to percent of charge values.

SPECIFIC	PERCENT	PERCENT OF
GRAVITY	OF CHARGE	CHARGE NEEDED

1.265	100%	0%

1.225	75%	25%

1.155	25%	75%

1.120	0%	100%

When you know the percent of charge and the Amp Hour (AH) rating of your battery, you can calculate the approximate time needed to bring your battery to a full charge.

To convert Reserve Capacity to Amp Hours, divide Reserve Capacity by 2, and add 16:

Amp Hours = Reserve Capacity + 16

To calculate time needed for a charge:

•Find the percent of charge needed. (A battery at 50 percent charge that will be charged to 100 percent needs another 50 percent (.50).

•Multiply the Amp Hour rating by the charge needed (.50) and divide by the charger setting (2, 20 or 60 amps).

•Multiply the result by 1.25 and you’ll have the time needed, in hours, to bring the battery to full charge.

•Add one additional hour for a deep-cycle battery.

Example:

Amp Hour Rating x % of charge needed x 1.25 = hours

Charger Settingof charge

100 (AH Rating) x .50 (charge needed) x 1.25 =	3.125
20 (Charger Setting)	hours
100 x .50 = 2.5 x 1.25 = 3.125
20

You would need to charge your 100-Ampere Hour Battery for a little more than 3 hours at the 20-Amp charge rate using the above example.

200.71232 specifications

The Sears 200.71232 is a versatile and innovative product that caught the attention of both homeowners and professionals alike. Designed with a blend of functionality and user-friendly features, this model stands out in the crowded market of home and garden equipment.

One of the main features of the Sears 200.71232 is its robust build quality. Constructed with durable materials, it is engineered to withstand the rigors of everyday use while maintaining its performance over time. The product often includes a powerful motor that ensures efficient operation, enabling users to complete their tasks quickly and effectively.

Incorporating advanced technologies, the Sears 200.71232 utilizes a state-of-the-art design that enhances its overall functionality. The implementation of an easy-start mechanism allows users to power up the device with minimal effort, making it accessible to a broader range of users. Additionally, the device often features adjustable settings, providing users with the flexibility to tailor its performance according to their specific needs.

Safety is another critical aspect of the Sears 200.71232. With a variety of built-in safety features, this model prioritizes user protection. These might include automatic shut-off systems, sturdy grips for better handling, and protective guards that prevent accidental injuries. The attention to safety reassures users, even those who may be less experienced in using such equipment.

The Sears 200.71232 is also designed with ease of maintenance in mind. Many components are accessible and can be serviced without the need for specialized tools, allowing users to keep their device in top condition with minimal hassle. This user-centric approach ensures that the upkeep of the machine is straightforward, promoting longevity and reliability.

Another notable characteristic of the Sears 200.71232 is its portability. Often designed to be lightweight and compact, it can be easily transported and stored, making it an ideal choice for those who may face space constraints or need to move the equipment around frequently.

In conclusion, the Sears 200.71232 is a well-rounded product that integrates durability, advanced technology, user-friendly features, and safety into a single unit. Its practicality caters to a diverse audience, whether for everyday household tasks or more demanding professional applications.