Apple has always taken software optimization and user experience seriously on iOS, but it keeps technical details quiet. It’s a hassle even to find out at what frequency Apple’s custom CPU cores run. It looks like Apple’s commitment to delivering “the best experience to customers” has taken a rather ridiculous turn. The company now admits that recent reports about throttling the CPU speed on older iPhones are true. If your iPhone feels slower, that might be thanks to Apple and its desire to offer you “the best experience.”

PR blasts about supposed innovation in battery design pour into ET’s mailbox like water into the Titanic, but a recent story about an MIT grad who founded a battery company is worth paying attention to. Qichao Hu is the CEO of SolidEnergy, a company that’s been working to improve lithium-ion energy density for the past five years.

When it is cold in winter, cars tend to have starting problems. This is not much better with electric cars, which inevitably lose capacity of their rechargeable lithium-ion batteries at freezing temperatures. Now, Chinese scientists have offered a strategy to avoid plunging battery kinetics. In a study published in the journal Angewandte Chemie, they designed a battery system with a cold-enduring hard-carbon anode and a powerful lithium-rich cathode, with the important initial lithiation step integrated.

PCB or PCM is protection circuit board, usually for small battery, typical use is for digital batteries, like mobile phone battery,camera battery,mp3 player battery,GPS batteries,heated clothing batteries and so on. Most time, Its for 3.7V or 7.4V battery, It has four basic functions of over charging, over discharging, short circuit,over current.some batteries may also need PTC and NTC.

Discharge and charge rate for lithium battery is the multiple between the current and the capacity, its unit is C. for example, if the lithium ion battery has a capacity of 800mAh, and its discharging current is 1600mA, then its discharge rate is 2 C rate, if its charging current is 800Ma, then its charging rate is 1 C, normal lithium ion battery and Li polymer battery can work with 1C charging and 2C discharging.

This new chemistry has one important difference from the lithium-ion model: It uses sodium instead of lithium. Sodium and lithium are both alkali metals, with the same +1 charge. But sodium is a whole lot more abundant than lithium, which could make the new battery chemistry less expensive than lithium-ion cells.

Li-ion batteries contain a protection circuit that shields the battery against abuse. This important safeguard also turns the battery off and makes it unusable if over-discharged. Slipping into sleep mode can happen when storing a Li-ion pack in a discharged state for any length of time as self-discharge would gradually deplete the remaining charge. Depending on the manufacturer, the protection circuit of a Li-ion cuts off between 2.2 and 2.9V/cell.

Did you ever think about why your phone works at all? Probably not. But, if you think about it, all portable gadgets rely on a battery to keep ticking – and some have better battery life than others. That’s why we’re going to take a peek at what keeps your phone ticking and why some batteries do better than others.

Lithium cell phone mainly by the plastic case cover lithium battery protection circuit board (PCB) and recoverable fuse polyswitch Some manufacturers also configure the NTC identification resistor or vibration motor or charging circuit and other components.

Tesla has made a number of fancy electric cars, but making them so fancy also means they’re incredibly expensive. The Model 3 is supposed to be Tesla’s mainstream “budget” offering, though production has been slow to get underway. Part of the problem may be the battery packs, which are manufactured at the huge Gigafactory in Nevada. Some former Tesla employees report that many Model 3 batteries were assembled by hand, and there could be quality issues that make them more prone to failure. Tesla, however, denies this.