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09-17-2017, 07:14 PM   #16
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One reason to have backup battery was to avoid the nuisance need to Re set date/time after charging.
But l think this is solved with newer
When I get home I will recharge the KS-1 from quarter to full and if the date/time stays up, I will not really need a backup battery for my usage.

09-18-2017, 10:51 AM   #17
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QuoteOriginally posted by wombat2go Quote
One reason to have backup battery was to avoid the nuisance need to Re set date/time after charging.
But l think this is solved with newer
If your clock battery is weak, that is definitely a good rational for having a battery to swap in. Neither my K10D nor my K-3 developed that problem, but it is not unknown.

09-19-2017, 07:50 AM   #18
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Charging with the D_BC109 charger:
The K-S1 manual states an approximate recharge time of 240 minutes ( 4 hr) .
After charging for a bit over 4 hours and re-inserting the battery,
the date/time was still running.
So I will try to use this camera with just one battery.
09-19-2017, 07:54 AM   #19
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I definitely think the life span of off brand (I've used Watson and Wasabi) batteries wasn't as long as Pentax brand. I have no idea why, but initially the off brands held a charge as long as Pentax batteries, but within six months they would be maybe half as long and within a year were hardly worth putting in the camera. Over time that's about six off brand batteries and similar number of Pentax batteries (all of the Pentax batteries are still in service none of the off brand ones are). For what it is worth, I used the same Pentax charger with all of them.

01-23-2018, 08:36 PM   #20
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Apparently I spoke too soon. One of the Wasabi that fits the Sigma DP1 has gone bad. It started swelling in the camera and was a little difficult to remove. Battery is over 3 years old.
01-24-2018, 02:40 PM - 1 Like   #21
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I use a few very cheap (about 3.5 USD) batteries from my local store interchangeably with original batteries. I do not use them very often but after a 2-4 years of use, I did not notice a very noticeably significant difference between them.

In my opinion, the most important is buying fresh batteries and not keeping them too long in unloaded state because it is very disadvantageous for Li-ion batteries.

In this way, I destroyed one an almost new Sony battery (original so definitely good quality) after it had been discharged for nearly a year.

Last edited by bladawiec; 01-24-2018 at 02:49 PM.
08-12-2018, 04:32 PM - 2 Likes   #22
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Quick update.
My DOT-01 batteries died at the age of 25 months. Even though they didn't swell, at some point they took less than 10 shots per charge, so I ordered a Pentax D-LI 68 and a Fuji NP50 from Adorama. When the new ones were delivered, I gave one last chance to DOT-01s and I was able to squeeze four and one shot(s) out of them!

My 44 months old Pentax D-LI68 is also dying but it would still take maybe 30 shots or so.

Next update in a year or two (if I remember ) will be how Fuji NP50 performed.
08-12-2018, 05:03 PM - 1 Like   #23
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I've had a couple of D-LI68 Wasabi's swell on me. All of my Pentax batteries are good after three years. I recently got some Fuji NP50s, so far so good.

4 Days Ago - 2 Likes   #24
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I don't have problems with my batteries in use. They all last about the same, Pentax or otherwise. However, what I do notice is they do not hold a charge in storage. I'll charge them up, and in a month or two use the camera and the battery is showing 75% on the meter. The aftermarket batteries are worse, showing 50% or less. Charge them up and they last for a whole day of usage. But they don't store well.


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