BRESSER Portable power supply PSW 88 (Refurbished)

Self-sufficient travel with the BRESSER solar charger Whether camping, sailing, trekking or swimming at the nearest lake – anyone who enjoys being outdoors for long periods of time does not want to do without their smartphone, tablet, powerbank, etc. But one question quickly arises: where can I find the nearest power socket? After all, every battery runs out and our practical everyday helpers can't manage without electricity. With the ultra-compact BRESSER solar charger, you simply use the power of the sun to charge your devices. The environmentally friendly solar energy is free of charge – and you remain independent of the power grid! Simply open it up, put it down and immediately produce green solar powerThe handling is very simple: unfold the solar panel and align it as perpendicularly as possible to the sun. Then connect the device to be charged to the solar charger, either with a suitable USB cable (not included) or with the included DC connection cable. The charging process begins immediately. Which devices can the solar panel charge? The solar charger gets all devices with a USB power supply connection or the above-mentioned DC power plug connection up and running again in no time – e.g. smartphones, tablets, power banks, portable playstations, MP4 players, GPS devices and Bluetooth headphones. It is also suitable for charging large power stations such as the BRESSER Power Station 100 Watt (art. no.3810000) and the BRESSER Power Station 500 Watt (art. no. 3810020) as well as power stations from other manufacturers with suitable connection values.Universal charger with flexible connection options Two black USB A sockets for normal charging and another orange USB A socket with QC3.0 standard for fast charging of newer generations of devices are available for powering your devices. An additional universal connection cable with a hollow DC plug 5.5/2.1 mm in diameter and 2.5 metres long, as well as 3 plug adapters (3.5/1.35 mm, 5.5/2.5 mm, 8.0/5.5/0.8 mm) are included in the scope of delivery. The polarity of the connectors is as follows: Inner contact = positive (+), outer contact = negative (-). How long does it take to charge a battery?Most modern devices with built-in batteries indicate the current charging status of the battery on a display or status LEDs. The charging process is also automatically terminated by the internal charger of the smartphone or tablet, etc., as soon as the battery is full.Nevertheless, it is helpful to know how long a full charge theoretically takes with an empty battery. This is the only way to choose the right solar panel model for the requirements of the devices you want to charge.Here is a short calculation: Divide the capacity of the battery (mAh) by the charging current of the charger (mA) and multiply this by a factor of 75. This then gives you the approximate charging time in minutes that is required to fully charge the battery at 100% sunshine duration.Example 1: A battery with a capacity of 3000mAh (3.0 Ah) and a charging current via 5 volt USB connection of 3400mA (3.4 amps). So 3000 : 3400 x 75 = 66 minutes. Dividing the result by 60 gives the charging time in hours: 1.1 hours.This means that an average smartphone can be fully charged in just about 1.1 hours with a 90-watt solar panel.   Example 2: A large power station battery with a capacity of 13000mAh (13.0 Ah) and a charging current via 18 volts DC plug connection of 5000mA (5.0 amps). So 13000 : 5000 x 75 = 195 minutes. Dividing the result by 60 gives the charging time in hours: 3.3 hours.This means that an average smartphone can be fully charged in just about 3.3 hours with a 90-watt solar panel.   Carabiner hook for attachment included In order to attach the solar panel securely to an object and align it perfectly with the sun, 4 sturdy snap hooks are included in the scope of delivery. Simply connect them to the riveted ring eyelets of the solar panel and use them to hang the solar charger stably, e.g. on a tent loop, a fence or other suitable holding points.Innovative solar cell technology with high efficiency Monocrystalline silicium cells ensure high efficiency and the fastest possible charging of the device batteries. This means maximum electricity yield per solar surface. As a result, you benefit from relatively high charging currents and short charging times with a compact design.Easy transportThanks to the modern and flat design, you can easily fold the individual segments of the solar panel into a small bag and stow it in your luggage while saving space. Always ready for the next spontaneous use.Robust, dust- and water-repellent materials The durable Cordura fabric is extremely tear-resistant but still flexible. It protects the valuable solar panel from damage and provides the necessary stability during use. The solar panel is dust- and water-repellent, it withstands most weather conditions and is your ideal companion for almost all outdoor activities. Nevertheless, the solar panel should not be exposed to direct rain or extreme humidity.IMPORTANT NOTESThe solar panel does not have an integrated charger or charge controller. Therefore, it is not suitable for directly charging loose battery cells or lead batteries. It is only suitable for smartphones, tablets and power banks, for example, because they always have built-in internal chargers.The solar panel does not have its own battery, but serves exclusively as a power source in sunshine for charging electronic devices.When connecting the devices to be charged via the DC bar plug, always ensure the required voltage and correct polarity. Otherwise, damage may occur to the electronics of the solar panel and the devices to be charged.Do not leave the solar panel outdoors at night with high humidity or in the rain. This could damage the internal electronics. FEATURESSolar panel with output power of max. 90 wattsSolar panel for charging battery-powered devicesSuitable for smartphones, tablets, power banks and larger power stations etc.Simply unfold, point towards the sun and the charging startsStay independent even without a 230-volt socketFree electricity through solar energyNo emissions and zero noiseConnection via 3 x USB A and DC hollow plug with adaptersIncludes one orange USB A jack with QC3.0 for fast chargingMonocrystalline silicium cells with high efficiencyEnables high charging currents and short charging timesCompact transport dimensions due to foldable designRobust, dust- and water-repellent materials Ideal for all outdoor activitiesSPECIFICATIONSOutput power of the solar panel: 90 wattsOutput voltage at the DC connection cable: 18 voltsOutput current at the DC connection cable: max. 5.0 ampsUSB A sockets: 2 x black USB and 1 x orange USB QC3.0 (for quick charging)Output voltage at the black USB A sockets: 5 voltsOutput current at the black USB A sockets: max. 3.1 ampsOutput voltage and current at the orange USB A QC3 socket: 5V3.4A/9V2.5A/12V2.0ADC connection cable length: 2.5 metresDC plug adapters: 3.5/1.35mm, 5.5/2.5mm, 8.0/5.5/0.8mmPolarity of DC connectors: inner contact = positive (+), outer contact = negative (-)Transport dimensions when folded: 520 x 370 x 45 mmDimensions when unfolded: 1280 x 520 x 35 mmWeight: 3.7 kgSCOPE OF DELIVERYSolar panel 90 Watt (1 piece)Carabiner hook (4 pieces)Integrated DC connection cable (1 piece)Plug adapter (3 pieces)User manual

NOTE: This item is a used or returned product. This means: The item may show slight signs of use and the packaging may differ from the original packaging. Please note that refurbished items generally come with a 12-month warranty.After three years of testing and refining we are extremely proud to present the new Explore Scientific High Resolution (HR) Coma Corrector. This corrector is a class of it´s own - it is fully functional for visual use and expands the focal length by only 6%! The Explore Scientific Coma Correktor is delivered as a complete set together with a rotating helical focuser with laser-etched scale, so you get a full package: corrector, adaptor to T2 (M42x0.75mm), adaptor to M48 (M48x0.75) and the helical focuser for visual fun. This coma corrector really is "high resolution" - it deliveres a visual polystrehl performance of 0,98 at f/4 and 0,96 at f/3! So it can stay in the telescope - and you will not only enjoy a tack-sharp Jupiter, but aslo sharp and defined moons in the future! What this means in terms of performance is shown in the three pictures with the graphs - the sharpness increase in those comparisons with and without corrector are stunning (examples are 400mm f/4, f/3,5 and f/3). Please notice: These graphs are for FLAT FIELD! You will get this performance without refocussing! Diameter of the field is 30mm - it doesn´t make sense to increase this with 2" and fast optical systems. Length of the 2" corrector barrel is approx. 85mm and it can be used with almost all 2" focusers on the market. To use the HR Coma Corrector visually, you need to have at least 32mm spare inward travel at your focuser, while the focus is on the same plane as the focusers end. Photographically there is no problem - the HR Coma Corrector shifts the focus outward by about 35mm, so that you will have no problem in achieving focus, when you are able to focus your camera without the HR Coma Corrector. FEATURESEliminates coma, field-curvature and astigmatism in newtonians Diffraction limited performance on axis and in the field Flattens the field Works for very fast systems down to f/3 Four-lens construction Can be used with almost all 2" focusers on the market SCOPE OF DELIVERY High Resolution (HR) Coma Corrector Adaptor to T2 (M42x0.75mm) Adaptor to M48 (M48x0.75) Helical focuser

Converts the FL55SS into a high-performance astrograph The kit consists of a high-performance flattener lens, a reducer and the EX TUBE 66 connection ring, which was developed for the FL55SS Fluorite Apochromatic Refractor and improves photographic performance by dramatically flattening the surface. Ultra-sharp image over the entire field of view of the DSLR full-frame sensor The Flattener HD for the FL55SS reduces the change in the focal length of the FL55SS to a minimum and improves the evenness of the surface for prime-focus photography. The 44 mm image circle covers the entire field of view of a full-frame DSLR camera. When used in combination with the HD5.5 Reducer, the focal length is reduced by 0.79x (from f5.5 to f4.3) and the image circle retains a diameter of 44 mm, which significantly improves the sharpness across the entire field of view of DSLR cameras with a full-frame sensor. 96% light volume to the edge of the field of view The Flattener HD was specially developed for the FL55SS refractor to reduce loss of light to a minimum across the entire 44 mm image circle of full-frame DSLR cameras. Exceptionally high contrast The same anti-reflective AS coatings used on our high-end VSD 100 f/3.8 astrograph are used to provide an outstanding light transmission of 99.9% per lens surface. Thanks to the matte black surface of the Reducer HD kit, loss of light, ghosting and scattered light and largely prevented. FEATURES Ultra-sharp image over the entire field of view Designed for full-frame cameras Illuminates 44 mm image circle Cutting-edge AS coating DELIVERY CONTENT Flattener HD kit for FL55SS 66 mm extension tube Dust caps