Your explanation is a little off. In your case you need 13.5…13.8V (2x3x2.25V) if you want to keep them connected all the time (float charge), or higher (up to 14.5V) if you plan to terminate manually after a few hours. Do you have 2 batteries in parallel, connected to one charger? I guess best way is to step down the voltage to a usable voltage. While charging, monitor the voltage of each cell individually. 693709-001: AC Smart power adapter (120 watt) - Slim form factor, with power factor correction (PFC) - Requires separate 3-wire AC power cord. Connect the resistor and read the voltage.

Point 6: same with all 5 cells. So for 2 batteries in series, you need respectively 27.6V or 29V. This would mean it is a 24V motor, and it won’t work properly, even with your big 12V battery: voltage is too low. If you need float charge for operational readiness, lower the charge voltage to about 2.25V/cell. The absorption time is shorter with Gel and AGM batteries – around two to three hours. Best regards, This will limit the current. If speed is important, go for 2 chargers, each with 2A or 3A, and charge the batteries separately. A battery charger of 50 amps, for instance, calls for a cable of 50:3 or 16.6 mm². So the resistor must be (800V-600V)/2A= 100 ohm. 1) I connect them in series to make a 48V 26Ah unit, and charge this pack using a suitable charger for 48Volts. Battery should be full! Use 2.7 ohm in the emitter of the transistor to limit to 250mA) to Anthony: Once connected, you can bypass the resistor.

I think most solar panel regulators are one-direction so it is always impossible to feed energy from the battery or generator back into the solar regulator. That is the universal rule. 5 amp, both packs must be able to handle 5 amps. Please clarify. There might be some trimmer potentiometer inside to set the output voltage, and even if you get it to only 13V it will be better for charging. For instance, when a 100-amp charger is linked parallel to a 50-amp charger, the charge current will not be evenly distributed over both. and please ddo provide a suitable way to recharge it.. How long should I charge the battery?

When a more powerful charger with 2.5 Amp rating is used, intended for laptop B, with higher power consumption, its output with the laptop A maybe as high as 20-21V with full current drawn and higher after charging finishes. 13…14V: OK. 14…15V: you will need to terminate manually once the batteries are full (meaning: charge current has dropped to less than 100mA or so).

That means 4V per cell, so they will never get completely full, but they will get 75% full. But as long as you limit the charge current, there is no real danger. I need 12v though so I will have to wire them in series. you will need 2x 13.5 ... 13.8 = 27V ... 27.6V to charge the batteries. 50x12=600V. Their voltages should be as good as equal. Cars often use 14.5V. The possibility remains that one of the chargers will switch to the absorption phase sooner than the others. And how should I know when the charging is complete with sealed lead acid? The output from this was 13.5v 1500mA. Battery won't charge but I have no power computer doesn't work it says it needs to restart in safe mode but won't. What I do in such cases is to keep the battery connected to a power supply at 15V approx., current limit 1A. The current would go higher if I set increase the voltage. And the linear regulators have some voltage drop, so the 12V might be a bit short. is it safe to use the laptop while it is charging at the same time, Toshiba Laptop switches off while charging, but works fine in safemode, My PC is stuck in safe mode/bios thingy. Which is the best battery can I use for a rechargeable LED of 9W that recharges automatic when in use?

Hi Andre, Depending on the size of the transformer or adapter, you will damage it, and the battery too. BU-206: Lithium-polymer: Substance or Hype? Andre, @sujan paudel: you can always connect 2 identical batteries in parallel (+ to + and - to -). While we make all efforts to answer your questions accurately, we cannot guarantee results. When the pack reaches 80V, the current will start dropping gradually. Hey Andre, Thank you for your answer i really aprecciate it. For R1 I would take 2.2ohm 2watt. The 80V supply must have current limiting, of course. 2: I have no experience with this. Always be careful with Lithium packs!

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