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EverActive NC1000 Plus charger - does not fully charge the batteries

viper111 7926 17
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  • #1 17164911
    viper111
    Level 13  
    I have an everActive NC1000 Plus charger and new AA GP2500, AA Duracell2500 batteries.
    When I connect the rechargeable batteries to charge, they charge until they reach the voltage (measured on the charger) about 1.40-1.43 V. The problem is that as I put a charged battery in the wireless keyboard, it detects too low keyboard voltage and stops working properly.
    The question is why the batteries do not fully charge, i.e. 1.50 V? As I measure charged batteries with a meter, the measured voltage is even lower of 1.38V.
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  • #2 17165091
    viaxa
    Level 22  
    If they are NiMH, the output voltage is 1.2V.
  • #3 17165096
    pietia86
    Level 26  
    The charger probably recharges them to 1.5V, but when it stops charging, the battery voltage drops and this is normal.

    Remember that Ni-Mh batteries have a working / average voltage of 1.2V. Some devices may show that there is no maximum charge level.

    If you have such an advanced charger - do the test, charge the batteries in it and then perform the discharge with the measurement of capacity. You'll see if they are topped up to the end.
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  • #4 17165326
    JacekCz
    Level 42  
    pietia86 wrote:

    Remember that Ni-Mh batteries have a working / average voltage of 1.2V. Some devices may show that there is no maximum charge level.


    +1
    As far as branded electronic devices have clearly written acceptance of the battery in the instructions, or if they do not have, by implication, no acceptance (or at least no promises from the manufacturer)

    I will add, for low-current devices (and the expected long time), I think that it makes sense to use an alkaline battery, for example, NiMh battery even without power consumption has self-discharge measured in a few weeks (and consequently they fall quite quickly, although they do not undergo typical wear). Alkaline comes half a year, or five years, until electric exhaustion.
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  • #5 17165328
    pietia86
    Level 26  
    @JacekCz Low-current (but not exaggerated) solutions work well with Sanyo / Panasonic Eneloop.
  • #6 17168290
    viper111
    Level 13  
    It's a shame to admit, but I just checked and my batteries are 1.2V (NiMH).

    Can you possibly recommend any 1.5V rechargeable batteries?
  • #7 17168304
    Wojtek(KeFir)
    Level 42  
    No, because there are no such. Ni-Mh are by definition 1.2V.
  • #8 17168320
    viper111
    Level 13  
    And other rechargeable batteries, not NiMH?
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  • #9 17168368
    Wojtek(KeFir)
    Level 42  
    No-NiMh then go to wikipedia, type "battery list" or something similar and it will pop up. Other batteries with different chemistry, of course, have different voltage but also different shapes of use and most importantly other charging systems.
  • #10 17168776
    rogos87
    Level 12  
    viper111 wrote:
    And other rechargeable batteries, not NiMH?

    There are Ni-Zn batteries, they have a voltage of 1.6V. However, they have a smaller capacity than Ni-Mh, about 600mAh for AAA and about 1500mAh for AA. They also require a special charger because the final voltage when charging reaches 1.9V. And they are more expensive than Ni-Mh.
  • #11 17168885
    viper111
    Level 13  
    I found something else like Fenix ARB-L14-1600u, anyone used?

    EverActive NC1000 Plus charger - does not fully charge the batteries
  • #12 17170160
    pietia86
    Level 26  
    To be honest, I see this invention for the first time. The point is that it is a Li-Ion battery and the total output voltage is 1.5V, while lithium batteries are usually around 3.6 - 3.7V. By. there must be a converter there, and this in turn will cause that in my opinion this equipment will not be suitable for use in low-current receivers (by the discharge itself through the converter).

    Another issue is the price of such a solution.

    In fact, I don't know if it makes sense to fight for batteries in a wireless keyboard.

    Maybe you'd better buy good alkaline batteries. For example, in my A4tech computer rodent, the batteries last for at least 4 months. I know that the keyboard is different, but it may be worth it ...
  • #13 17170199
    bestboy21
    Level 40  
    pietia86 wrote:
    Maybe you'd better buy good alkaline batteries.


    And here you are wrong ;)
    Lithium cells (not to be confused with LiIon) are best for equipment with low power consumption.
    I mean something like the 6106 varty.
    At low currents (10-50mA) their capacity is actually 2900mAh, no alkaline wonders have such capacity, well they have exceptions but they are more expensive ;) (duracell turbo maxx)

    You are right, a decent battery and half a year will work in such a rodent and in the remote control it goes into years.
  • #14 17170209
    pietia86
    Level 26  
    bestboy21 wrote:
    You are right, a decent battery and half a year will work in such a rodent and in the remote control it goes into years.


    That's exactly what I meant, i.e. not specifically to buy alkaline, but a "good" battery. Rechargeable batteries sometimes do not work with such solutions.
  • #15 17708650
    emiterek
    Level 11  
    I found something ...
    it is not possible to change the parameters of each chamber separately (during charging / discharging) - in the NC-1000 the charging / discharging current is not dependent on other cells previously installed. In the BC series, the current is limited to the value that we will set for the first battery installed - maybe you have set something wrong
  • #16 17734778
    Anonymous
    Level 1  
  • #17 17735120
    rogos87
    Level 12  
    The disadvantage of zinc batteries is the small capacity, about 600mAh for AAA and about 1500mAh for AA. Many manufacturers probably specifically indicate the capacity in mWh to make it look better on the label.
  • #18 19533198
    Przemek2802
    Level 12  
    If I can, I'll step on it. I have such a charger, for a few days they had two AAA rechargeable batteries, and from today the charger does not work, it does not turn on at all. Are there any fuses in it?
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Topic summary

✨ The discussion revolves around the everActive NC1000 Plus charger and its inability to fully charge AA NiMH batteries (GP2500 and Duracell2500) to the expected voltage of 1.50V. Users clarify that NiMH batteries typically have a nominal voltage of 1.2V, which can drop to around 1.38V after charging. It is noted that while the charger may initially charge the batteries to 1.4-1.43V, this is normal behavior for NiMH batteries. Suggestions include testing the batteries' capacity after charging and considering alternative battery types, such as Ni-Zn batteries, which have a higher voltage of 1.6V but require a specific charger. The conversation also touches on the use of alkaline batteries for low-current devices due to their longer shelf life compared to NiMH batteries.
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FAQ

TL;DR: On the NC1000 Plus, NiMH AAs charge correctly: nominal is 1.2 V. "Ni-Mh batteries have a working / average voltage of 1.2V." Confirm by running a charge–discharge capacity test instead of judging by voltage. [Elektroda, pietia86, post #17165096]

Why it matters: This helps NC1000 Plus owners fix “not fully charged” worries and pick cells their keyboards/remotes read correctly.

Quick Facts

Why do my fully charged NiMH AAs not read 1.5 V on the NC1000 Plus?

NiMH cells are 1.2 V devices, not 1.5 V like alkalines. After charging stops, their voltage settles to a lower resting level. That drop is normal and does not mean undercharging. Some devices misread 1.2 V chemistry as “low.” Verify health by measuring discharged capacity in the charger’s test mode. "Remember that Ni-Mh batteries have a working / average voltage of 1.2V." [Elektroda, pietia86, post #17165096]

Will my wireless keyboard misread NiMH and show low battery?

Yes. Some manufacturers either declare NiMH support or avoid any promises about it. If they don’t, devices may show incorrect levels with 1.2 V cells. For long runtimes at low current, primary batteries can be a better choice. NiMH also self‑discharge over weeks when idle. [Elektroda, JacekCz, post #17165326]

How do I test if my NC1000 Plus fully charges my cells?

Do a capacity test in the charger, not just a voltage check.
  1. Fully charge the cells in the NC1000 Plus.
  2. Run a controlled discharge with capacity measurement.
  3. Compare measured mAh to the cell’s rating to confirm full charge.
"Perform the discharge with the measurement of capacity." [Elektroda, pietia86, post #17165096]

Are there 1.5 V rechargeable AAs I can use instead of NiMH?

NiMH are 1.2 V by definition, so not 1.5 V. Nickel‑zinc rechargeables exist at about 1.6 V. Expect lower capacities, around 600 mAh (AAA) and 1500 mAh (AA). They also demand a dedicated charger because charge termination reaches about 1.9 V. [Elektroda, rogos87, post #17168776]

Are 1.5 V USB‑rechargeable lithium AAs (e.g., Fenix ARB‑L14‑1600u) good for keyboards?

They are Li‑ion cells with an internal converter that outputs 1.5 V. That converter draws quiescent power, so ultra‑low‑drain receivers can fare worse. Price is also higher than NiMH. "There must be a converter there." Consider primary batteries for keyboards if runtime matters more than rechargeability. [Elektroda, pietia86, post #17170160]

For low‑drain devices, which primary AA is better: alkaline or lithium?

Choose primary lithium AA for low‑current loads. At 10–50 mA, they deliver about 2900 mAh. "Lithium cells (not to be confused with LiIon) are best for equipment with low power consumption." Quality alkalines work, but offer less capacity at those currents. [Elektroda, bestboy21, post #17170199]

Which rechargeable NiMH work well in low‑current devices?

Low‑current applications often do best with low‑self‑discharge NiMH. Sanyo/Panasonic Eneloop are a proven option. Users report stable performance for remotes and similar gear. Still, check your device’s manual for NiMH acceptance. [Elektroda, pietia86, post #17165328]

Can I set different charge currents per slot on the NC1000 Plus?

Yes. On the NC‑1000, the current you choose is not tied to previously inserted cells. By contrast, BC‑series units limit current to the value set for the first battery. If behavior seems linked, reinsert cells and reselect per‑slot settings. [Elektroda, emiterek, post #17708650]

My NC1000 Plus wont power onwhat should I check first?

Remove all cells. Try a known‑good wall outlet and the supplied power adapter. Reinsert one cell and see if the display wakes. If it stays dark, contact service. Per‑slot behavior and settings do not prevent power‑up on this model. [Elektroda, emiterek, post #17708650]

Do Ni‑Zn rechargeables have downsides compared with NiMH?

Yes. Their capacity is smaller: about 600 mAh for AAA and 1500 mAh for AA. Many brands print mWh to appear higher on labels. Factor this into runtime expectations if you switch chemistries. [Elektroda, rogos87, post #17735120]

What other rechargeable chemistries exist, and do they need different chargers?

Other chemistries have different voltages and charging systems. Before switching, confirm size, use profile, and required charger type. Using the wrong charger can damage cells or devices. Search a battery list to compare options and constraints. [Elektroda, Wojtek(KeFir), post #17168368]

Why do NiMH seem to go flat in storage?

They self‑discharge, even unused. "NiMh battery even without power consumption has self‑discharge measured in a few weeks." For long idle periods, primary alkaline or lithium cells can last months to years. This is an edge case for very low‑power gadgets. [Elektroda, JacekCz, post #17165326]
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