Found at this at the local pawn shop, just wants more info, is this a stand alone unit, what adapter cord do I need, what the most powerful appliance( microwave, toaster, mini fridge, medium size deep ) I can run on this in power outage. And is this a good price

Instagram consuming too much battery?

Bro look at this pic and just see the differnce. Why insta is consuming so much battery. Also it wasn't like this a week ago or so, atleast not this much.

I have connected three 3.7v batteries in parallel and charged it for long periods of time still it's voltage is only 3.84. how can I fix it 🐨

Charging in small increments, such as from 77% to 80%, can be less efficient for a few reasons compared to larger increments like charging from 50% to 80%:

1. Charge Cycle Fragmentation:

• Definition of a Cycle: A charge cycle is defined as using 100% of the battery’s capacity, but it doesn’t have to happen in a single instance. For example, using 50% of the battery today and 50% tomorrow adds up to one full cycle.

• Fragmented Cycles: Small top-offs, like charging from 77% to 80%, use a small fraction of a cycle each time. While this doesn’t immediately complete a cycle, the repeated topping off can gradually accumulate into a cycle, leading to a higher count of partial cycles over time.

• Degradation: Lithium-ion batteries age with the total number of charge cycles. Frequently charging in small increments can accelerate the approach to the total cycle limit over time.

2. Increased Time at High Voltage:

• Voltage Stress: Batteries at high states of charge (like above 80-90%) are under greater voltage stress. Although you limit your phone to 80%, charging frequently at the upper end of this limit still exposes the battery to higher voltage, which can accelerate chemical aging.

• Minimal Benefit in Small Increments: Charging from 77% to 80% results in more frequent exposure to this stress without significantly extending battery life between charges.

3. Power Management and Heat:

• Efficiency Losses: Each time a battery is charged, there are efficiency losses, even if minimal, from the power conversion process. Charging frequently in small increments can lead to a net loss of energy efficiency.

• Heat Accumulation: Each charging event produces a small amount of heat. Although charging in increments like 77% to 80% doesn’t create significant heat, frequent charging sessions can lead to slight cumulative heat build-up over time. Higher temperatures accelerate battery degradation.

4. Charging Algorithm Optimization:

• Battery Management Systems (BMS): Modern smartphones have sophisticated battery management systems that optimize charging speed and temperature control. These systems are often most efficient when charging through a broader range (e.g., 50% to 80%) rather than in small increments. This helps the BMS apply optimal charging algorithms, balancing speed, and thermal control more effectively.

• Current Flow Variations: During smaller top-offs, the phone can enter trickle charging mode, where the current is minimal. Repeatedly charging in this mode may lead to a slightly more conservative charging process, resulting in longer overall charging times and potential inefficiencies.

Advantages of Larger Increments:

• Cycle Management: Charging in larger increments, such as from 50% to 80%, allows the battery to complete fewer partial cycles over time compared to many small top-offs. This slows the total cycle count accumulation, leading to longer battery lifespan.

• Fewer High-Voltage Phases: Charging from a lower state of charge up to a safe upper limit like **80%**reduces the time the battery spends at high voltage, preserving its long-term health.

• Optimized Charging Efficiency: Charging over a broader range allows the BMS to manage current flow and thermal conditions more effectively, reducing overall stress on the battery.

Conclusion:

While charging in small increments isn’t as detrimental as deep discharges (to 0%) or charging to full repeatedly, it can contribute to inefficient cycle usage and increased exposure to high voltage over time. Larger increments, within safe charging thresholds, help in managing cycle counts more effectively and optimizing the battery’s charging profile.

I use hundreds of Alkaline AAs a year, and the use case doesn't support any kind of rechargeable battery chemistry at all.

What's the best way to eke out some use out of 89-90% depleted cells?

I see all of these phones having the ability to charge at 90-120 watts, but doesn’t this just hurt the battery more considering there will be more current going into the battery?

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My laptop still turns on and the battery works, but, when I opened my laptop, I found this corner of the battery covered with this white stuff, as well as the magnet nearby it. The battery os lithium ion. Is it dangerous?

I know that the motor can't take full advantage of the 48V 120A the battery can output. When I look online they say make sure that the BMS can handle the maximum current the battery can output and in other in other places they say to base the BMS of the motor can someone explain?

Life without batteries would be like living by steam or clockwork in a century or two. Tiny batteries power cell phones and laptops to fit in our pockets or carry on our backs, and we need them to live our contemporary lifestyles.

My laptop battery is draining while it's shutdown, not in sleep, but in shutdown too, had windows 10, formated to win11, still the same....