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DeadJohn · 10-15-2021, 09:18 PM

Originally posted by biz-engineer

Battery from 2012, it's old, I would return it and ask for a new one not from 2012. While a 2012 battery may be working fine, the capacity won't be at its best, especially for the coming years of use.

Originally posted by biz-engineer

<snipped for brevity> The question is, even if a 2012 battery works fine now, how much capacity will remain 5 years from now. IMO, they should sell 8 years old Li-Ion batteries as new, that's just wrong, knowing that Li-Ion battery wear out with time even if unused.

I think you've lost track of the original poster. The OP just received a battery that was manufactured at the end of 2018.

The batteries from 2012 were purchased by others, and received a long time ago. They've been using the batteries for years through many recharge cycles.

biz-engineer · 10-15-2021, 10:08 PM

Originally posted by DeadJohn

I think you've lost track of the original poster. The OP just received a battery that was manufactured at the end of 2018.

I missread the serial number. Oupps. 2018, yeah, it's fine.

Chester UK · 10-16-2021, 12:58 PM

Surely the life expectancy of a rechargeable battery is measured in the number of recharge cycles possible before it stops holding any charge, rather than in years?

Wheatfield · 10-16-2021, 01:17 PM

Originally posted by Derek

Thanks to everybody! I shall quit fretting about things and instead think about always having a warm spare battery this winter.

As mentioned, don't worry overly about the age, but you might find it takes a few charge cycles to get the expected usage out of it.

ZombieArmy · 10-17-2021, 09:35 PM

Originally posted by Chester UK

Surely the life expectancy of a rechargeable battery is measured in the number of recharge cycles possible before it stops holding any charge, rather than in years?

If left at 0% charge for years it could "possibly" damage the battery. But it's unlikely this battery was left in such a state since Lithium batteries are charged to about 50% before shipping.

**Mooncatt** · 10-20-2021, 10:28 PM

This is a good primer on Li-ion care, and covers the effects of storage at various charge states and temperatures. Hint, there's a reason they are shipped from the factory with only a partial "storage" charge.

BU-808: How to Prolong Lithium-based Batteries - Battery University

To the OP specifically, OEM Pentax batteries seem to have a good reputation for longevity, and sounds like you don't have much to worry about.

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10-15-2021, 09:18 PM	#16
DeadJohn Pentaxian Join Date: Jan 2011 Location: New York Posts: 4,834	Originally posted by biz-engineer Battery from 2012, it's old, I would return it and ask for a new one not from 2012. While a 2012 battery may be working fine, the capacity won't be at its best, especially for the coming years of use. Originally posted by biz-engineer <snipped for brevity> The question is, even if a 2012 battery works fine now, how much capacity will remain 5 years from now. IMO, they should sell 8 years old Li-Ion batteries as new, that's just wrong, knowing that Li-Ion battery wear out with time even if unused. I think you've lost track of the original poster. The OP just received a battery that was manufactured at the end of 2018. The batteries from 2012 were purchased by others, and received a long time ago. They've been using the batteries for years through many recharge cycles.

10-15-2021, 10:08 PM	#17
biz-engineer Pentaxian Join Date: Feb 2015 Photos: Gallery Posts: 12,249	Originally posted by DeadJohn I think you've lost track of the original poster. The OP just received a battery that was manufactured at the end of 2018. I missread the serial number. Oupps. 2018, yeah, it's fine.

10-16-2021, 12:58 PM	#18
Chester UK Junior Member Join Date: Mar 2016 Photos: Gallery Posts: 47	Surely the life expectancy of a rechargeable battery is measured in the number of recharge cycles possible before it stops holding any charge, rather than in years?

10-16-2021, 01:17 PM	#19
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,987	Originally posted by Derek Thanks to everybody! I shall quit fretting about things and instead think about always having a warm spare battery this winter. As mentioned, don't worry overly about the age, but you might find it takes a few charge cycles to get the expected usage out of it.

10-17-2021, 09:35 PM	#20
ZombieArmy Pentaxian Join Date: Jun 2014 Location: Florida Posts: 3,210	Originally posted by Chester UK Surely the life expectancy of a rechargeable battery is measured in the number of recharge cycles possible before it stops holding any charge, rather than in years? If left at 0% charge for years it could "possibly" damage the battery. But it's unlikely this battery was left in such a state since Lithium batteries are charged to about 50% before shipping.

10-20-2021, 10:28 PM	#21
Mooncatt Loyal Site Supporter Join Date: May 2020 Location: Wisconsin Photos: Gallery Posts: 1,373	This is a good primer on Li-ion care, and covers the effects of storage at various charge states and temperatures. Hint, there's a reason they are shipped from the factory with only a partial "storage" charge. BU-808: How to Prolong Lithium-based Batteries - Battery University To the OP specifically, OEM Pentax batteries seem to have a good reputation for longevity, and sounds like you don't have much to worry about.

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