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Sender: "piclist-bounces@mit.edu" Date: Sat, 15 Feb 2020 06:22:34 -0800 Subject: RE: [CAUTION: Failed DKIM Test]Re: [EE] large USB power banks Thread-Topic: [CAUTION: Failed DKIM Test]Re: [EE] large USB power banks Thread-Index: AQDgcr56Fl1VYQGlE3WZgjo82+RlegKSrqJAqfKbOuA= Message-ID: <000001d5e40b$5dcbfb00$1963f100$@amulvey.com> References: <5E47FC33.4080704@narwani.org> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <5E47FC33.4080704@narwani.org> Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US Content-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of amulvey.com designates 24.169.71.174 as permitted sender) receiver=protection.outlook.com; client-ip=24.169.71.174; helo=mulvey.us; dkim-signature: v=1; c=relaxed/relaxed; h=from:to:references:in-reply-to:subject:date:message-id:mime-version:content-type:content-transfer-encoding; d=amulvey.com; s=amulvey; a=rsa-sha256; bh=WDf8lehtlXxSnKcJ+++2DyuRkbTn3Bi536INWYbiUYw=; b=sat8QOZQRVQctSKNTv0NT/Nt9ba3Nag5gJr5/ZV0aAAopm0cFNjG050elfJRX9gyg qaeHkEgVpBl3+LUPVEPtRFf9T22HNZ9VRws2BX/DKeW47fH5DIWEYzBkmtx3Q2Uz0aQ xowXb9h05gBGQzqg9V72qjtpIRqRjnu5RxMwlWs=; authentication-results: spf=pass (sender IP is 24.169.71.174) smtp.mailfrom=amulvey.com; mit.edu; dkim=pass (signature was verified) header.d=amulvey.com;mit.edu; dmarc=bestguesspass action=none header.from=amulvey.com;compauth=pass reason=109 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-topics: [EE] x-me-bayesian: 0.000000 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 I bought one to run a microcontroller in low energy mode and it shuts off every time the device goes to sleep. What little specs there were made no mention of this. Allen -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Neil Sent: Saturday, February 15, 2020 9:12 AM To: Microcontroller discussion list - Public. Subject: [CAUTION: Failed DKIM Test]Re: [EE] large USB power banks You should specifiy the minimum capacity you need. One of the more important criteria I look for is the ability for the=20 power bank to stay on with very little load, as many devices I use will=20 not draw enough current at times and the power bank will shut down. =20 This one has a feature where if I turn on the built-in LED light, it=20 will keep the USB ports on... https://www.amazon.com/gp/product/B00VWV8LD4 Cheers, -Neil. On 2/14/2020 11:56 AM, David Van Horn wrote: > I'm looking for a couple of large USB power banks, and hoping to get some recommendations. > I see mAh ratings that are starting to sound like stun gun voltages, whic= h is why I'm not just grabbing the biggest number on Amazon > > The application is astrophotography, running a bunch of peripherals including a lens heater. > > > -- > David VanHorn > Lead Hardware Engineer > > Backcountry Access, Inc. > 2820 Wilderness Pl, Unit H > Boulder, CO 80301 USA > phone: 303-417-1345 x110 > email: david.vanhorn@backcountryaccess.com > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .