Hi, Ted
I've had that happen--intermittently-- with both the SD1 and SD2 chargers. I think it's a pretty common occurrence and not something you need to be too concerned about (unless the charger is actually defective). If you are able to
vape normally on the
batteries, even if the light never turns green, then your
batteries and the charger are probably working ok
This topic has been raised a number of times by SD users. As I recall, these were the main points to consider:
1. make sure you insert the charger into the outlet
before you put the battery into the charger
2. make sure the battery is inserted correctly with the +/positive side toward the light
3. sometimes it helps to make sure the battery terminals and the pop out connectors on the charger itself are clean (give them a wipe every so often)
if none of that works---
4. sometimes it helps to
very gently pull on the silver charger connectors. This one may be useful if, for some reason, the charger isn't making full contact on both ends of the battery. But it's also tricky because you can risk damaging the charger if you're too rough on it.
and finally
5. though it's certainly more reassuring and satisfying to see that little green light, it's not really necessary to charge the batteries to green because most of the charge takes place in the first few hours
Here are a few excerpts from similar questions and responses from the TW forums (some responses are are from Trog--who still makes the SD1 and designed the SD2):
May 7, 2010:
I recently received my screwdriver. After a week or so my charger would remain Red for hours, never turning Green. Thinking I got botched batteries; I ordered a new charger and two new batteries. Again, after a week, the light remains red and never switches to green. I've tried changing sockets and even brought the chargers into work to try the outlets there. Is this common for the Screwdriver's chargers? Is it the charger or is the batteries? Or, am I doing something wrong. (i.e. not depleting the battery of their charge before placing them on the charger) Any help would be greatly appreciated.
Response: When I got my SD I went to charge both the batteries, initially one battery charged fine, the other one did not. I would place the battery in the charger and then plug it in, then nothing, just the red light, no warmth for hours, never green. I then tried plugging the charger in first and then placing the battery in the charger , then it "woke up" and started charging, got warm and got a green light a few hours later, been fine ever since.
Jan 8, 2010:
I just got my SD MKII and one of the batteries is also not getting a green light on the charger, after many hours of charge. . . . I tried it in the SD to see if it had a charge and it seemed OK, but I dunno. . . Is there a trick to get this batt full green? All the others only took an hour or so.
response: after its been in the charger for a bit try using it.. see how long it runs for.. they dont have to go green in the charger..
November 10, 2010
[it's not true that] a screwdriver battery is 3.7 volts... its isnt.. it comes off the nano charger at 4.2 volts.. the voltage then starts to drop off slowly (or quickly in the case of a normal e cig battery) as the battery runs down... at some point the vapor drop off will cause the user to decide it's time for a fresh one.. a normal e cig battery will have a cut off point of 2.7 volts... with a screwdriver battery it's simply down to the user when they put a fresh one in.. with a battery voltage much below 3.5 volts, performance will drop off.. it's best to change them before the voltage drops off too much..
it doesn't [have to go green to be fully charged].. it can be taken off the charger whenever it suits the user.. what goes into the battery isnt a linear process.. at first a lot of charge goes in.. the battery voltage starts to go up... as the battery voltage goes up, the amount of charge going into the battery slows down.. with a nano charger it goes roughly like this.. the first three hours.. the battery is 90% charged or nine hours run time instead of ten.. after that, the charges rate slows right down... it can take longer to put the last 10% in than the first 90%... if time doesn't matter, leave it in the charger.. if time does matter, take it out sooner .. its up to the user..
Links to the above posts:
Batteries not charging (Screwdriver)
Screwdriver MK2 battery question
My take on the SD MK2
Hope this helps
Andi
