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20 volt portable (battery powered) power packs?

i need a 17-25 volt battery powered rechargeable power pack preferably $50. if you cant find one for under $50 i would still be glad to know where to find one. it needs to have at least one :o shaped socket and can plug into a wall socket (:o shaped thing) and i need it to run for about 5 hours per charge. im trying to run a raspberry pi, screen and usb hub off this if that helps.

Not to rain on your parade, but I seriously doubt that this exists in that price range. Looking at some portable tool Li-ion packs should tell you that. Most are rated right around 3.0 Ah and without knowing the drain on the stuff you're trying to run it would be a guess, but I'm thinking 5 hours is about 2 1/2 to 4 hours longer than it will run here. You won't get quality packs for that price range either from what I'm seeing. Then there is the charging circuitry to consider. Just at an offhanded guess, you'll need more like 5.0 Ah and maybe higher to run this that long and the 3.0 Ah packs are barely in your price range. You may be able to get a better and closer estimate using the design resources at the link below. I wish you luck and hope you're right.

http://www.powerstream.com/tech.html

Good luck, good hunting and stay safe!

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Tyco Ho Scale Train Lot Power Pack Cars Track Switch Misc
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KATO HO N Scale Power Pack UNITRACK 22 014
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MARX HO TRAIN SET ORIGINAL BOX 17840 POWERPACK 6019 LOT with TRACK
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Kato 30 630 HO Unitrack Power Pack Assortment Urban Industrial Junction
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2 Packs 5702 Model Power HO Scale Hand Painted Figures Brand New On Card
2 Packs 5702 Model Power HO Scale Hand Painted Figures Brand New On Card
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2 Packs 5717 Model Power HO Scale Hand Painted Figures Brand New On Card
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2 Packs 5741 Model Power HO Scale Hand Painted Figures Brand New On Card
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VINTAGE LOT OF 4 BACHMANN HO SCALE TRAIN CARS IN BOXES plus power pack and track
VINTAGE LOT OF 4 BACHMANN HO SCALE TRAIN CARS IN BOXES plus power pack and track
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VINTAGE BACHMANN HO SCALE Train NIB Tyco Track Power Pack Switch Tower Lot
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HO  POWER PACK   ROAD BED 36 X 45  BACHMANN TRACK w mp POWER TO THE TRACK
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KF Power Pack HO Scale Model CB400
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Tyco Ho Scale Train Power Pack with Misc Items
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50 PIECES OF HO VINTAGE BACHMANN TRACK IN 3 BOXES PLUS POWER PACK
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Bachmann HO Gauge Track Set 44 2779 Steel with Bachmann Power Pack 6607
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VINTAGE ATLAS Track Turnout Switches 5 Aurora Power Packs HO H20 Tower
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Vintage Lionel HO Powerpack LOT 0181 0101 0102 w Box
Vintage Lionel HO Powerpack LOT 0181 0101 0102 w Box
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Vintage Bachman HD Train Set With Track And Power Pack Excellent
Vintage Bachman HD Train Set With Track And Power Pack Excellent
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NMINT Bachmann HO Scale Train Track Railroad Power Pack  Plug AC  DC Power
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TYCO HO TRAIN SET DO85 SANTA FE ENGINE FREIGHT CARS ELECTRIC POWER PACK
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Vintage RARE MARX HO TRAIN Transformer Powerpack 6020 FR speed control
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Bachmann HO Mixed Lot Rolling Stock Cars and Power Pack
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Marklin HO Power Packs Locomotive Car and Re Railer 4 EX
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VINTAGE Bachmann HO Scale AE44 6605 Power Pack and Gauge Steel Track Set Lot
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