x
This website is using cookies. We use cookies to ensure that we give you the best experience on our website. More info. That's Fine
HPC:Factor Logo 
 
Latest Forum Activity

sig 3 backup battery?

1 2
mr-mac Page Icon Posted 2018-02-25 9:47 AM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
It's no coming back to life.. Although my main batt seems to have taken a charge.

Anyone know where and what the backup battery is?

Thanks
 Top of the page
mr-mac Page Icon Posted 2018-02-25 3:45 PM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
Seems to have risen to between good and low now see what happens ??
 Top of the page
Rich Hawley Page Icon Posted 2018-02-25 4:52 PM
#
Avatar image of Rich Hawley
Global Moderator
H/PC Guru

Posts:
7,188
Location:
USA
Status:
Sometimes when a LION cell has died, it won't take a recharge...but sometimes you can jump start it by forcing a slightly higher voltage onto the cell directly.

If you don't have a coin cell in the thing as a backup battery, then it is probably either a charging capacitor or a rechargeable internal battery that is doing the job.
 Top of the page
mr-mac Page Icon Posted 2018-02-25 5:27 PM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
I would never shove a charge on a li-ion esspecially not the older types and not knowing what's in the batt cell wise. And tbh if its gone high resistance even if you do bring back it isn't gonna give a decent length of charge.

Main batt charged normally but will recell the original then recell the aftermarket as they won't hold charge and they can get much higher mah now than when these came out.

Just wondered if someone knew what the backup mem battery in sig 3 was so can have one ordered before i open it ??

 Top of the page
Rich Hawley Page Icon Posted 2018-02-25 9:15 PM
#
Avatar image of Rich Hawley
Global Moderator
H/PC Guru

Posts:
7,188
Location:
USA
Status:
What's a little caustic explosion among friends? Desperate times call for desperate action!

Actually I have resurrected old battery packs doing just that...forcing them to charge individual cells at 3.5 volts instead of 3 volts for about 10 minutes...of course you have to bypass the voltage limiting circuitry of the battery pack or the devices itself. And afterwards, for the most part, the battery pack performed flawlessly as it was originally intended...

I agree with the rebuild philosophy however, and as you can tell by all the posts I made over the years on this website, have no hesitation on rebuilding using new cells.

The backup battery is internal, and is one of those little rechargeable coin type 3V lion batteries that is connected (soldered) to the motherboard. But it easy to desolder it and replace once you have dismantled the unit.
 Top of the page
Jake Page Icon Posted 2018-02-25 10:31 PM
#
Avatar image of Jake
Moderator
H/PC Vanguard

Posts:
2,842
Location:
Choking on the stench of ambition in Washington DC
Status:
Rich, what interesting advice. If a laptop battery needed your jump start, and say it was a 14v battery, what would you spike it to, 16?
 Top of the page
CE Geek Page Icon Posted 2018-02-26 3:54 AM
#
Avatar image of CE Geek
Global Moderator
H/PC Oracle

Posts:
12,676
Location:
Southern California
Status:
This sounds like a whole CESD you could write for us, Rich. How about it?
 Top of the page
mr-mac Page Icon Posted 2018-02-26 8:59 AM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
My battery man has 3400mah Panasonic with tabs for my smartbook (and they tested well, should make a diff over originals which would be in 2000mah area.

Just asked him about 18500's for sig

Backup batt sitting in good now without dropping into low so hopefully no too bad bit will replace if needed in both.
 Top of the page
mr-mac Page Icon Posted 2018-02-26 9:16 AM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
Most modern li-ion are 4.2v charging voltage not 3 (3 is where cut off should come in to protect cell). But 3 may charge it a little if its below 3.

I guess your rescue isn't for dead li-ion where the resistance has gone high but maybe a batt that's been left empty too long so charge circuit can't detect a cell exists. Adding a voltage for a wee while maybe doesn't even charge batt bitt adds a small bit of voltage so charge circuit detects cell. However again if been left like that for any length the cells will likely be well past best so tbh a re-cell is more sensible. I wouldn't recommend CESD as mistreatment of a cell and an explosion (remember some hpc are diff chemistry and some may even have the older more dangerous IMR type chemistry. There are plenty of places info can be looked up without us having an article thay may leave us open to someone getting it wrong ??????

Anyway new cells will be on way. Hopefully can get sig3 battery up to nearer extended batt levels with modern li-ion cells that can actually hold much higher mah hope for 1500 so over double the 700 of original.

All I can say to anyone re celling battery. Don't buy ultrafire (they print lies) and don't belive the mah of unheard of cells on eBay. Buy branded sony, Samsung, Panasonic or something that's been tested as a good performer.

John

 Top of the page
stingraze Page Icon Posted 2018-02-26 9:30 AM
#
Avatar image of stingraze
Subscribers
H/PC Vanguard

Posts:
3,697
Location:
Japan
Status:
 Top of the page
Rich Hawley Page Icon Posted 2018-02-26 11:11 AM
#
Avatar image of Rich Hawley
Global Moderator
H/PC Guru

Posts:
7,188
Location:
USA
Status:
Probably not a good idea to force start batteries anyway. But the important part is you can't do a whole battery at once, like a laptop battery… you have to do individual celks within the battery pack. And if there is any individual cell overload protection then you have to bypass that.

As far as the new batteries go… I've found that the Sony, Panasonic, and Sanyo 18650s seem to be the most reliable… averaging 2600 to 2800 mAh. Anything over that is probably a phoney mislabled battery… and we've all read about the 40> gms method of weight as an indicator…

Actually saw one labled 9800 mAh. Who are they trying to kid!!?
 Top of the page
mr-mac Page Icon Posted 2018-02-26 11:27 AM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
Tha is to specialist high power torch and vapers there are some li-ions that test to either hold quite decent current for a long time and some that actually provide more than their mAh rating at lower current draw (probs at hpc end of current draw).

Ken a guy from Glasgow tests li-ions for torch and vape users when you hit some with high current they drop off a cliff really early but some maintain it very well. And its not always the big brands. There are some sony, Samsung and Panasonic do well. In 18350 efest or shokli do quite well. It's often different companies in lead depending on which cell so no overall winner.

Can maybe ask lad if he has some test figures fro lower current and which are top ones in each size for mAh as you'd be shocked how bad some can be.
 Top of the page
mr-mac Page Icon Posted 2018-02-26 1:42 PM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
And no hadn't heard of 40> gms
 Top of the page
mr-mac Page Icon Posted 2018-02-26 1:44 PM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
Thank you Stingraze will see if can source
 Top of the page
mr-mac Page Icon Posted 2018-02-26 1:50 PM
#
Avatar image of mr-mac
H/PC Elder

Posts:
1,973
Status:
Can get ML2020 for a couple of £ in uk. And quite common as BMW use them in some keys ??
 Top of the page
1 2
Jump to forum:
Seconds to generate: 0.218 - Cached queries : 72 - Executed queries : 9