How big is the battery? Is it heavy?

PD 5K Apparel Battery

Mini 5K Apparel Battery

B19G Apparel Battery

B25A Accessories Battery

B22A Gloves & Socks Battery

Capacity: 5075mah

DC Output: 7.3V / 2.5A

Weight: 6.53 oz 

Dimensions: 3.07” x 2.60” x 1.00”

Compatibility: For all ororo heated vests, heated jackets, heated pants  and heated hoodies

Capacity: 4800mah

DC Output: 7.4V / 2.5A

Weight: 6.53 oz

Dimensions: 3.07” x 2.48” x 0.98”

Compatibility: For all ororo heated vests, heated jackets, heated pants  and heated hoodies

Capacity: 5200mah

DC Output: 7.4V / 2.5A

Weight: 8.47 oz

Dimensions: 3.74” x 3.34” x 0.98 “

Compatibility: For all ororo heated vests, heated jackets, heated pants  and heated hoodies

Capacity: 2200 mAh

DC Output:7.4V / 2A

Weight: 3.7 oz

Dimensions: 3.15" x 2.30" x 0.67"

Compatibility: For all ororo heated accessories except for gloves 1.0

Capacity: 2000mAh

DC Output: 7.4V / 2A

Weight: 3.6 oz

Dimensions: 3.01” x 2.11” x 0.8”

Compatibility: For ororo heated gloves 2.0, mittens 2.0, socks 3.0 / 3.5 / 4.0, and scarves 2.0