Question 1

Are these the same as LR44G

Accepted Answer

This is what I found .. stats listed below .. look at your product for what it exactly requires .. 
Contents
LR44 Battery Equivalent
This website is a guide to the several equivalent LR44 batteries so you know which one to buy.
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About LR44
LR44 is an alkaline 1.5 V battery. The most common equivalent batteries are:
AG13
L1154
LR1154
157
Silver Oxide Equivalent Batteries
LR44 can be also be replaced with a silver oxide battery. The most common silver oxide equivalents are:
SR44
SR44SW
303
357
Label Confusion
Many generic packages will list both AG13 and 357 on the label, which are different battery chemistries.  Generally, if it lists any alkaline name, then the batteries are alkaline and not silver oxide.

Comparing Equivalent Batteries in Detail
So now you know the equivalent names. Even though the size is the same, they may not be exactly alike.  Prices can range among equivalent batteries and knowing how to compare specifications will make you better informed for choosing one.

These days, brand name batteries are mainly selling silver oxide equivalents. So if you are buying from a big box retailer, you will only probably find 357 or 303 Energizer or Duracell batteries. But with the price of silver going up, they are getting more expensive all the time.  Alkaline LR44 batteries are cheaper, but which one should you use?

Alkaline Equivalent
Cheap
Voltage decreases with battery life
Shorter life
Silver Oxide Equivalent
Expensive
Maintains voltage with use
Longer life

As you can see, the main differences are the price, life, and voltage.  So if you are just using the battery for some toys, blinking lights, or a calculator, an alkaline might suit you better.  Some electronics which require a certain voltage to operate such as a digital caliper, will fare better with a silver oxide battery.

Compare the following voltage discharge graphs.  You can see silver oxide equivalent batteries maintain a higher voltage longer.  This is why devices that require a certain voltage to operate will seem to eat up alkaline batteries because at 50% capacity, the alkaline battery will not have enough voltage to operate the device.
Chart 1. Alkaline discharge curve.  
Chart 2. Silver oxide discharge curve.

Comparing Equivalent Capacities
If you use a lot of LR44 batteries, then the following info can be useful.  When shopping for an LR44 equivalent, you can compare battery capacity by looking at the milliampere (mAh) number.  Often they will claim 150 to 165 mAh capacity, but is that really true?  To find out, you need to take a closer look at their data sheet to compare apples to apples.

Chinese Brand 1. Lists capacity at 158 mAh.
Chinese Brand 2. Lists capacity at 165 mAh.

Energizer Brand. Lists capacity at 150 mAh.
Maxell Brand. Lists capacity at 165 mAh

At a glance of the numbers, it seems the cheaper Chinese brand batteries have more capacity than brand name Energizer batteries.  But to compare equally, you must use the same cut off voltage. Using a cut off voltage of 1.3V, we see Chinese brand 1 reaches it in 500 hours at 6800 ohms.  So to calculate capacity: 
Chinese Brand 1: 1.5/6.8 x 500 = 110 mAh.  
Chinese Brand 2: 1.5/5.0 x 360 = 108 mAh
Energizer: 1.5/6.5 x 630 = 150 mAh
Maxell: 1.5/4.7 x 500 = 160 mAh

As you can see, these generic batteries have less capacity when compared with the same cut off voltage.  How do you choose?  The price of Chinese Brand 1 would need to be 73% of the Energizer price to be equal, which actually is pretty easy to find.

Question 2

Is it compatible to L1154?

Accepted Answer

Some stores will have a chart detailing which types of batteries (in this case LR44 and your L1154) will be compatible. My hunch is LR44 would not be compatible, but check the bottom area of the package which also will indicate what types can replace others.

Question 3

would this fit V13GA?

Accepted Answer

yes

Question 4

Are these LR44 or A76?

Accepted Answer

Both. They are interchangeable.

ASIN	B000J656LS
Amperage	76 Amps
Antenna Location	Camera, Clock, Radio
Battery Capacity	105
Battery Cell Type	Alkaline
Brand Name	Duracell
Customer Reviews	4.5 4.5 out of 5 stars (16,080)
Global Trade Identification Number	05000394504424
Item Dimensions	12 x 5 x 12 Millimeters
Item Type Name	battery
Item Weight Unit of Measure	0.01 Kilograms
Manufacturer	other
Model Number	LR44
Number of Batteries	2 LR44 batteries required. (included)
Reusability	Single Use
Unit Count	2 Count
Voltage	1.5 Volts

Duracell Specialty Type LR44 Alkaline Coin Camera Battery - Pack of 2

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