Most electrity using equipment uses standard size cells. All power cells store power almost without running down when not in use; they have an very long shelf life. Typically they lose about 0.5% of total capacity/year, but there is variation(if it matters:roll 3d6/20 for the yearly loss % for a particular cell). All the cells are rechargeable being Superconductor loops being made of materials that are electrical superconductors, storing electricity without any losses due to resistance. Recharge times are very fast: AA cells can be recharged in one second, each larger size doubles the time with F-cells requiring a bit over a minute to recharge.

Smaller Cell types(AA-D) come in two forma factors: The normal cylindrical and flexible.

The flexible one are flat polymer power cells that are used for powering clothes, printed computers, and similar devices. They are attached like stamps and peeled off when exhausted. Gadgets noted as using flexible cells use them instead of normal power cells; they’re also embedded into smart labels, smart paper, and similar disposable items. Flexible cells are double the cost of regular cells.

The larger cells(E to H) are box form.

The given durations for items are using TL 10 cells, for TL 11(*5 cost) cells multiply by 1.5. If you use old TL 9 cells, they are 2/3 the duration.

AA cell:These tiny cells operate devices with minimal power requirements, like very small robots or brain implants. $1, 0.0002 lbs. (5 000 AA cells weigh 1 kg.)

A cell: These small cells are often used in clothing or consumer goods that require low power outputs. They’re about the size of a watch battery, or postage stamp-sized for flexible cells. $2, 0.002 kg. (500 A cells weigh 1 kg.)

B cell:These power wearable computers, tiny radios,small tools, and other devices with modest power requirements, including some low-powered weapons. A typical B cell is the same size as a pistol cartridge or an AA battery. $3, 0.02 kg. (50 A cells weigh 1 kg.)

C cell:These are the most common energy source for personal beam weapons, tools and high-power electronics. Equipment designed for larger or smaller cells often has an adapter for C-cell operation. Each cell is about the same size as a pistol magazine. $10, 0.2 kg.

D cell:These power military beam weapons and heavy equipment. They are often worn as a separate power pack. They’re about the size of a thick paperback book. $100, 2 kg. LC4.

E cell:These power small vehicles, battlesuits, support weapons and other power-intensive systems. They’re about the size of a backpack. $2,000, 10 kg. LC4.

F cell:These power medium vehicles and small cannon-sized beam weapons. They’re about the size of a compact car engine. $20,000, 10kg. LC4

G cell:These power large vehicles and medium cannon-sized beam weapons. They’re about the size of a large car engine. $200,000, 100kg. LC4

H cell:These power huge vehicles and large cannon-sized beam weapons. They’re about the size of a small car. $2,000,000, 1000kg. LC4

Power in civilized locations comes normally from huge fusion plants, but there are options for traveling power.

Internal Combustion Engines (TL6): At the turn of the last century, Sears, Roebuck and Company sold a primitive gasoline generator by mail order A noisy belt-driven contraption, it spurted smoke and oil and broke down frequently. By contrast, modern versions are whisper-quiet and small enough to fit in a large backpack Both provide external power for a dozen or so items.

Portable Gasoline Generator(TL7):The 1-gallon fuel tank lasts for 10 hours. Weight is x2/3 at TL8 and x1/2 at TL9+. $600, 22 kg. LC4.

Fuel Cells (TL8):Fuel cells use an electrochemical process to convert chemical energy directly into electricity, making them more like an engine than a battery. One advantage of fuel cells over more conventional generators is that they can operate indoors with less noise and no harmful emissions.

Portable Methanol Fuel Cell (TL8): A suitcase-sized generator. It uses 1 gallon of methanol every 3 days. $5,000, 6 kg. LC4.

Semi-Portable Hydrogen Fuel Cell (TL8): A large cart capable of powering a whole household on a single hydrogen cylinder for 5 hours (extra cylinders are $100, 30kg). $6,000, 45kg. LC

Solar Panels:Solar panels convert light into electricity. They work in any environment where strong light (such as sunlight) is available. The primary development at ultra-tech TLs is in inexpensive production of thin-film solar cells.

Solar Power Array (TL9): This semi-portable array of solar panels is a generator that provides external power. It takes a minute to deploy, and covers about 400 square feet. $10,000, 230 kg. The size assumes an earthlike level of sunlight; multiply cost and weight by relative light levels for other environments. LC4

Fission Generators (TL9): Fission reactors produce power by splitting the nucleus of heavy fissionable elements such as uranium. The reactor and electric generator designs available at TL9 are much more compact and far less expensive than TL7-8 reactors. (They are still heavy, due to the shielding required.) A typical semi-portable system fits in a truck bed, and provides external power for five years before maintenance and refueling (50% of cost). $100,000, 450 kg. LC2

Fusion Generators (TL10): When fusion reactors first appear at TL9, they are gigantic installations that require heavy radiation shielding and frequent maintenance. At TL10+ fusion reactors produce less radiation (due to the use of harder-to-ignite but more efficient aneutronic fusion reactions) and are significantly lighter.

Semi-Portable Fusion Reactor(TL10): A small nuclear fusion reactor. It fuses hydrogen into helium, liberating energy in the process. $200,000, 45kg. Its internal fuel supply operates it for up to 20 years; refueling and maintenance is $20,000. LC3.

Portable Fusion Reactor (TL11): This is a compact reactor using antimatter or exotic matter (such as muons) to catalyze a fusion reaction. $500,000, 2.3 kg Its internal fuel supply operates it for up to 10 years; refueling and maintenance is $50,000. LC2