# Help Finding a Replacement Battery/Correct Connector **URL:** \ **Category:** Battery Products\ **Tags:** battery-products, cross-reference, power, part-identification\ **Created:** [November 9, 2023, 6:49pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558 "2023-11-09T18:49:54Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![nick.schultz01](https://avatars.discourse-cdn.com/v4/letter/n/df788c/32.png) [@nick.schultz01](https://forum.digikey.com/u/nick.schultz01)\ **Post date:** [November 9, 2023, 6:49pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/1 "2023-11-09T18:49:54Z")
Hello, I’m trying to upgrade the battery in a retro handheld called M17. I THINK I need a 3.7v 3500mAh replacement. But I need to know what type of connector this is, or what type of battery I need that I can solder the connections to this connector I already have. Hoping with these images, someone can assist me in finding the correct part. Thank you ![M17 Battery (3)](https://global.discourse-cdn.com/digikey/original/3X/f/9/f92ff0c29c4c7402de3f2588d1b1da3249989b34.jpeg) ![M17 Battery (2)](https://global.discourse-cdn.com/digikey/original/3X/8/e/8e234b03c89cbcc016002a2a1a47194989aaa84c.jpeg) ![M17 Battery (4)](https://global.discourse-cdn.com/digikey/original/3X/4/4/446863b7dabb0a1a1972239e43119ac3990ca2cb.jpeg) ---
**Author:** ![nick.schultz01](https://avatars.discourse-cdn.com/v4/letter/n/df788c/32.png) [@nick.schultz01](https://forum.digikey.com/u/nick.schultz01)\ **Post date:** [November 9, 2023, 6:50pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/2 "2023-11-09T18:50:42Z")
![M17 Battery (6)](https://global.discourse-cdn.com/digikey/original/3X/1/a/1a128e89d9534155c95735c76a9e505b53b31918.jpeg) ![M17 Battery (1)](https://global.discourse-cdn.com/digikey/original/3X/9/4/940b17992d506e94c1def5edbfb49897377b2233.jpeg) ![M17 Battery (5)](https://global.discourse-cdn.com/digikey/original/3X/2/9/29abf3bc4c97dd8794b4f2e5a884da9fa62ec7cc.jpeg) ---
**Author:** ![David\_1768](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1768/32/9762_2.png) [@David\_1768](https://forum.digikey.com/u/David_1768)\ **Post date:** [November 9, 2023, 7:21pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/3 "2023-11-09T19:21:42Z")
Hello nick.schultz01, welcome to the DigiKey TechForum. The battery looks like a Lithium-Ion. You will have to try and verify that. The closest capacity that we have are 3Ah (3000mAh) and 4.8Ah (4800mAh). [Click here for those options](https://www.digikey.com/short/r4qz3rqw). The closest I found to the look of your connector, is [455-1377-ND](https://www.digikey.com/short/bz10t04r), which has a contact spacing of 1.00mm. The contact is [455-1561-1-ND](https://www.digikey.com/short/d5nw0qpf), but you can also use a pre-crimped lead like [455-3998-ND](https://www.digikey.com/short/9j9hwfj1), which can be cut in half to make 2 leads for the connector. Please check the datasheets to verify compatibility to your application. ---
**Author:** ![nick.schultz01](https://avatars.discourse-cdn.com/v4/letter/n/df788c/32.png) [@nick.schultz01](https://forum.digikey.com/u/nick.schultz01)\ **Post date:** [November 9, 2023, 7:46pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/4 "2023-11-09T19:46:16Z")
Hi David, I think maybe these are the correct connectors + pins: > **[125CH-G-02 | Digi-Key Electronics](https://www.digikey.com/en/products/detail/adam-tech/125CH-G-02/9830336)** > > Order today, ships today. 125CH-G-02 – 2 Rectangular Connectors - Housings Receptacle White 0.049" (1.25mm) from Adam Tech. Pricing and Availability on millions of electronic components from Digi-Key Electronics. > **[125CTG-B-G-R | Digi-Key Electronics](https://www.digikey.com/en/products/detail/adam-tech/125CTG-B-G-R/10414840)** > > Order today, ships today. 125CTG-B-G-R – Socket Contact Gold 28-30 AWG Crimp Stamped from Adam Tech. Pricing and Availability on millions of electronic components from Digi-Key Electronics. ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [November 9, 2023, 10:19pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/5 "2023-11-09T22:19:14Z")
Those look right. I think you found the clone to the Molex [PanelMate 51146](https://www.digikey.com/en/products/category/rectangular-connectors/2027) and [contact](https://www.digikey.com/en/products/detail/molex/0506418041/1643330), which also look the same. The trick you’ll have is trying to crimp those tiny contacts onto the wire. The crimp tool designed specifically for that contact, the [WM9805-ND](https://www.digikey.com/en/products/detail/molex/0506418041/1643330), is the best choice to make a quality crimp, but it’s not cheap for a single job. Hobbyists might want to consider using the [1528-1683-ND](https://www.digikey.com/en/products/detail/adafruit-industries-llc/350/6026207), as, although it still isn’t cheap, it’s nowhere near the cost of a crimper designed specifically for that contact, and with a bit of practice, it will do a decent job crimping a number of different contacts which fit into 2.54mm and finer pitch connectors, so you may find further use of it in other projects. If you choose to pick up one of those connectors and contacts, I would highly recommend you order several extra contacts, as, if you are anything like me, you might lose one or two or damage a few during your crimping process. ---
**Author:** ![nick.schultz01](https://avatars.discourse-cdn.com/v4/letter/n/df788c/32.png) [@nick.schultz01](https://forum.digikey.com/u/nick.schultz01)\ **Post date:** [November 10, 2023, 3:26pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/6 "2023-11-10T15:26:52Z")
I’ve decided that due to how complicated doing this myself will be, that I’ll attempt surgery instead… wish me luck. And thank you for your help identifying parts. ![](https://global.discourse-cdn.com/digikey/original/3X/8/1/812e2f1d2cd4a620892881131d2a2ee6bc88f852.jpeg) ---
**Author:** ![David\_1528](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1528/32/47212_2.png) [@David\_1528](https://forum.digikey.com/u/David_1528)\ **Post date:** [November 10, 2023, 8:47pm UTC](https://forum.digikey.com/t/help-finding-a-replacement-battery-correct-connector/36558/7 "2023-11-10T20:47:17Z")
Good luck to you!