Discussion in 'QRP Corner' started by KC3AJV, Mar 18, 2021.
Forgive my ignorance - do you mean it needs at least 14.2-14.6v from the charger?
The battery, monitor, and LED all work fine when connected to the 14ohm resistor.
Too late to just order the suggested charger?
Ok, thanks. I really should have done a better job researching this gear. Serves me right.
No, it's not. I am only in a hurry so I can test the gear out before a trip I am taking. My trip is not until May, but currently I am limited to radio time during my lunch hour at work, and a few minutes here or there at home (lots going on at home). I know I will need all the time I can get to practice with the setup before trusting it in the field.
Welp, I did need a new SLA charger, so I guess it's not a total loss. I'll look into buying a proper LiFePo4 charger.
Thanks again for the help. If I do any more testing or figure anything out, I'll report back. I'll bring the 706 home and connect to my power supply, just to rule out the 706 being wonky.
I use a Bioenno 14.6V 2A LiFePo slow charger or a 50amp Victron solar charger.
One last thing. I couldn't help trying Batt #1 before I go home. It does not have anything connected to it, no monitor, LED, or switch. I read the voltage first, and it is sitting at 12.8V. I connected it to the 706, and viola! We have power.
So, either I trashed the Batt #2 throwing 8ish amps at it with this charger or it's a bad battery. I will NOT be charging batt #1 with this charger.
Do not worry. My 706mk2g takes 1.2A RX and does not like voltage below 11.5 volts. Therefore, I also want to buy a LiFePo4 battery, but at least for 50 Ah.
I have a Dakota 10Ah LiFePO4 and I got the recommended charger from Dakota. I also have a Bioenno 3Ah LiFePO4 and got their charger, even though it was probably the same thing as what I got from Dakota. I have different connectors on each so I have to use both. If there is a difference, at least I can't accidentally mix them up.
I do not know much about Lithium batteries, but I believe I have learned a cautious approach is warranted when choosing them over the familiar SLA 7.5Ah type.
I have a ExpertPower 5Ah LIFEPO4 battery, it says 14.4v charging voltage, 13.8v standby voltage, 2.5A max charge current. It def has a BMS.
I bought the Expert Power LIFEPRO4 charger, it's 2A and was $19.95 and you do NOT use it on AGM/SLA batteries.
They have the 5AH battery on sale for $35 now.
I use this to run my K2 and my LDG tuner when I go out and do POTA activations. I am usually onthe air for about 2 hours (CW) and I have yet to kill the battery. I charge it when I get home, and it takes less than 20 mins for a full charge.
ExpertPower also has LIFEPO4 from 5Ah all the way up to 200Ah and everything in between. I have been VERY happy with this brand.