Are the 9v batteries lsd (low self-discharge)? more importantly, are they 9.6v or 8.4v? only respond if you know.

Yes, they're low self-discharge (LSD). They're 7-cell units (8.4 V nominal).

Is it 10000mAh in total, or per individual battery?

D capacity is 10000mAh per battery. if you put two in parallel you get 20000 at 1.2 volts, if in series you get 10000 at 2.4 volts.

How would these perform in low temperature? I would need them to reliable work close to 0C (32F)

according to a chart here http://nordicgroup.us/battery/ a NIMH battery at 0C will have 80% of its room temperature (25C) capacity.

For the 9V battery - what are the exact dimensions (without posts) and how many recharge cycles are they rated for?

The ones I received measure 48.3 (45.3) x 26.5 x 17 mm (the 45.3 is the shoulder dimension you requested; full dimension offered for other readers). Oops: Description says 1,000 cycles (as "times"). I'd last thought it unspecified.

ASIN	B07PHCVSSS
Amperage	1.2 Amps
Brand	Amazon Basics
Customer Reviews	4.5 out of 5 stars 21,360 Reviews
Item Dimensions	10.7 x 7.6 x 4.6 centimeters
Item Weight	81 Grams
Item dimensions L x W x H	10.7 x 7.6 x 4.6 centimeters
Manufacturer	Amazon Basics
Model Number	COR00001
Number of Batteries	4 C batteries required.
Number of batteries	4 C batteries required.
Reusability	Non Rechargeable
UPC	192233063287 840095878630 840083670024
Unit Count	4.0 Count
Unit count	4.0 Count
Voltage	1.2 Volts

Amazon Basics 4-Pack C Cell Rechargeable Batteries, 1.2V (5000mAh Ni-MH), Pre-charged

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