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.

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Amazon Basics 4-Pack Rechargeable 9 Volt Ni-MH Batteries, 200 mAh, Pre-Charged, Long Lasting Power, Recharge up to 1000x Times

Amazon Basics 4-Pack Rechargeable 9 Volt Ni-MH Batteries, 200 mAh, Pre-Charged, Long Lasting Power, Recharge up to 1000x Times

Product ID: 156636400

Details

Battery Capacity
200
Battery Cell Composition
NiMH
Brand
Amazon Basics
Number of Batteries
4 Unknown
Recommended Uses For Product
Rechargeable C

⏳80% capacity retention for 24 months

🔋200mAh high-capacity power

♻️Rechargeable up to 1000x

Description

🔋 Stay charged, stay ahead—power your life sustainably!

POWER THAT LASTS - 200mAh Ni-MH cells deliver reliable energy for your essential devices.
PRE CHARGED READY - Use straight out of the box—no waiting, no hassle.
VERSATILE COMPATIBILITY - Perfect for cameras, remotes, toys, and more—stay powered everywhere.
SLOW DISCHARGE TECHNOLOGY - Maintains 80% capacity even after 2 years of storage.
ECO FRIENDLY RECHARGEABILITY - Recharge up to 1000 times, cutting waste and saving money.

Amazon Basics 4-Pack Rechargeable 9 Volt Ni-MH Batteries offer 200mAh capacity with pre-charged convenience. Designed for long-lasting performance, these batteries can be recharged up to 1000 times and retain 80% capacity over 24 months, making them an eco-friendly and cost-effective power solution for a variety of devices.

Specifications

ASIN	B07PHCSNZ2
Amperage	200 milliamps
Antenna Location	Rechargeable C (HR14) batteries to replace single use Alkaline C (HR14) batteries
Battery Capacity	200 milliamp_hours
Battery Cell Type	NiMH
Best Sellers Rank	#4,010 in Our Brands ( See Top 100 in Our Brands ) #56 in 9V Batteries
Brand	Amazon Basics
Customer Reviews	4.6 4.6 out of 5 stars (6,222)
Global Trade Identification Number	00192233063300
Item Dimensions	4.2 x 4.2 x 2 inches
Item Weight	4.8 ounces
Manufacturer	Amazon
Model Name	Rechargeable batteries
Model Number	COR00003
Number of Batteries	4 Unknown batteries required. (included)
Reusability	Rechargeable
UPC	192233063300 840095878647 840083670031
Unit Count	4 Count
Voltage	9 volts

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