20

Of course that depends on the battery, but Lithium Ion batteries were the standard for laptop/cellphone batteries last time I checked. A battery feels most happy being neither too full nor too empty, being not too hot, being not charged/recharged too often. If you don't need the battery, remove it from the battery pack (at about 60%) and store it dry and ...


12

Disclosure: Doing things such as this is my 'day job'. You can use a bicycle dynamo to recharge a suitable battery at very little expense and with minimal effort. Use of something like the "Reecharger" that you mention is not essential, does extremely little for you and, if their description of their own products are accurate, the Reecharger is a badly ...


9

I read somewhere that one issue (of several) that tends to shorten the lifetime of laptop batteries is heat from other components inside the laptop. So, if you happen to not be "on the move" with your laptop all the time, but instead end up using your laptop at the same desk for several days/weeks in a row, then you should remove the battery (don't forget to ...


8

It's very unlikely: all the modern chargers I've seen have an automatic cutout that prevents over-charging, by monitoring the batteries' voltage, and stopping the current when it reaches a certain level. As rechargeable batteries reach fully charged, the voltage rises relatively quickly, and the cutout gets activated. If the batteries were exceptionally ...


8

Yes, it matters, a little, but it also depends on your location. In your car, the process of converting fuel to movement is pretty inefficient (about 25% to 30%, according to this). That movement (kinetic energy, if you're a physicist) is then converted to electrical energy with an efficiency of 75% to 80%, giving you an overall efficiency of 18.75% to 24%. ...


4

The immediate previous sentence says: The other unknown that BNEF considers is the rise of autonomous cars and ride-sharing services like Uber and Lyft, which would all put more cars on the road that drive more than 20,000 miles a year. If there is a benefit to electric vehicles per mile driven, that benefit will be realized more quickly by someone who'...


3

The article is considering the total costs of ownership of electric vs internal combustion engined (ICE) cars, including purchase and running costs. One of the benefits of electric cars is that fuel costs are very low; the car costs more to buy, but costs less to run. The point at which owning an electric vehicle becomes more economical than an ICE one ...


2

Recharging details for lead-acid batteries are detailed in many places (for example). Quoting the linked site: Recharge time can be approximated by dividing the amp hours to be replaced by 90% of the rated output of the charger. For example, a 100 amp hour battery with a 10 % discharge would need 10 amps replaced. Using a 5 amp charger, we have 10 amp ...


2

I've read somewhere that this occurs because over time the positive plates of lead acid batteries corrode. The plates grow and start pushing at the weakest point which usually is the pole. This article briefly describes the process and mentions that you cannot prevent it, but you can take measures to avoid rapid corrosion: Limiting the depth of ...


2

Recharging (rechargeable) lithium-ion batteries is — unfortunately — not a straight-forward process. Unless you cap current you will damage severely-discharged batteries during the initial charging phase. They react very poorly to being overcharged. Even small amounts of undervolting will translate to large amounts of capacity loss. Added to that, there ...


2

Energy losses in a cable — due to resistance — are proportional to the current squared (I²). Thus if you double the current (by putting your panels in parallel) then you'll quadruple your losses ( (2I)² = 4I² ). When panels are connected in series, the voltages add up but the current remains constant. Thus to minimise line losses, connect panels in series....


2

Li-Ion batteries are worth recycling just for the lithium in them. This material can be re-refined, and made into new batteries. In this use they should show similar cost savings to recycled vs new aluminum. There is also the prospect of repurposing a worn battery for stationary use. E.g. It stores 30 kWh in your car for 3 years, then stores 10 kWh in ...


1

Jean-Paul's answer is part of the story. Charging rate influences the life of the battery. High power rate batteries (car starters) maximize the plate surface. They are designed to deliver a lot of current for a short period of time. They can be charged faster too, but suffer on deep discharge. Deep discharge batteries supply less current for a much ...


1

You probably don't need another controller. If you connect your panels in series - i.e. one string - you won't exceed 15A. You could connect them as 2 strings of 2 and that would be 30A in total. Only if you connect them all in parallel will you exceed 30A. You should check out the maximum input voltage of your MPPT. If the combined VOC of your panels ...


1

I have 1100 amp hour 24V battery bank with 2 solar controllers connected, each from a separate bank of solar panels. Works fine.


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